# total normal stresses of 110 and 40 kpa are applied to two planes at right angles in an element of soil. the shear stress acting on those palnes is 20 kpa. what must be the value of the pore pressure

33,383 results, page 61-
## trigonomentry using either exponential or complex

give the expansion of sin^8@ as a series of cos@ plz help me i only know the normal way of doing that but i do not know how to apply complex number or exponential

*asked by sam on September 21, 2016* -
## maths

find equations for the tangent and the normal at P (1n2, 2k) on the curve with equation y=ke^x, where k is a constant. (b) given that y=sin^-1x, show that (1-x^2)d^2y/dx^2-xdy/dx=0

*asked by skangele on October 3, 2013* -
## english

The antonyms of ignore,optimistic,humility,indolent,boring,attack,normal,innocuous,preserve,commence

*asked by chi on January 24, 2013* -
## public health

Most of the increase in medical cost is due just to normal inflation that has affected the entire economy.” Comment on the above statement.

*asked by thafer on March 29, 2011* -
## college

Consider a normal population with μ = 36 and σ = 4.9. Calculate the z-score for an x of 47.6 from a sample of size 14. (Give your answer correct to two decimal places.)

*asked by samantha on July 23, 2012* -
## BUSINESS 101

If a firm has a current ratio of 2.00,it means that for every $2in ___it has $1in___ A.total assets;current liabilities B.current assets;current liabilities C.total assets;total liabilities D.current assets;total liabilities my answer is c can somebody

*asked by bella on October 15, 2013* -
## Math

Hey guys I need some help with this question PLZ: A telecommunications company offers a rental deal which costs $30 per month plus 50c per call. a) Find the total cost (T1) for making x calls in a given month b)Find the total cost for making 52 calls in a

*asked by Liam on November 4, 2015* -
## Physics/Math

A stuntman drives a car (without negative lift) over the top of a hill, the cross section of which can be approximated by a circle of radius R = 110 m. What is the greatest speed at which he can drive without the car leaving the road at the top of the

*asked by COFFEE on February 13, 2007* -
## Chemistry

A clear colorless liquid in an open beaker was heated to boiling. The liquid began to boil at 110°C, and as vapors escaped, the temperature of boiling gradually increased to 115°C, at which the heating was stopped. On the basis of this information, we

*asked by Chris on May 12, 2010* -
## chemistry

A clear colorless liquid in an open beaker was heated to boiling. The liquid began to boil at 110°C, and as vapors escaped, the temperature of boiling gradually increased to 115°C, at which the heating was stopped. On the basis of this information, we

*asked by jasmine on May 18, 2010* -
## Science

1 kg of Nitrogen is mixed with 3.5 m3 of hydrogen at 300 K and 101.3 kPa and sent to ammonia converter. The product leaving the converted analyzed 13.7% ammonia, 70.32% hydrogen and 15.98% nitrogen. (a) Identify the limiting reactant? (b) What is the

*asked by Man Singh Chouhan on March 26, 2015* -
## physics

If a car is travelling at 60. miles per hour and the brakes are applied so that it accelerates at -15.0 ft/s2, how many feet will it take to stop? i realize i am posting a lot of questions, but i don't understand them!

*asked by Anonymous on January 21, 2011* -
## Physics

What net braking force must be applied to stop a car with a mass of 900 kg initially travelling at a velocity of 100 km/h within a straight-line distance of 50 m?

*asked by Syafiqa on July 17, 2010* -
## PHYSICS HELP

A disk has a moment of inertia of 3.0x10^-4 and rotates with an angular speed of 3.5 rad/sec. WHat net torque must be applied to bring it to rest in 3.0s? can some one help me out with this im lost!!!

*asked by PHYSICS HELP on November 14, 2007* -
## Written communication

Often applied to politicians, the term _______ suggests hiding one's feelings while obscuring or "spinning" facts. A. vacillate B. simulate C. dissimulate D. dissemble plz help me

*asked by Tank on August 26, 2014* -
## English

Sigmund Freud coined the term _______,which he applied to people who were extremely self-absorbed. A. Dryad B. suspension of disbelief C. moral D. narcissistic Answer: B?

*asked by Ciara on March 4, 2013* -
## science

A 1600kg car starts at rest and reaches 40 m/s in 6 seconds. I need to find: a) the change in kinetic energy b) work c) distance d) applied force of the engine

*asked by Abby on May 15, 2017* -
## physics

Suppose that in the same Atwood setup another string is attached to the bottom of m1 and a constant force f is applied, retarding the upward motion of m1. If m1 = 5.30 kg and m2 = 10.60 kg, what value of f will reduce the acceleration of the system by 50%?

*asked by TPAIN on October 25, 2009* -
## Physics

The flywheel is initially at rest. A force of 250 N is applied tangentially to the rim, causing it to rotate about its central axis. what is the energy acquired by it after 1 minute? can anyone help me with this?

*asked by Oisin on August 11, 2010* -
## physics

When brakes applied to a moving car travelling at 60km/hr it decelerates at a uniform rate of 5ms-2. Calculate the time taken to reach a velocity of 36km/hr

*asked by bola on February 23, 2010* -
## Physics

Suppose that in the same Atwood setup another string is attached to the bottom of m1 and a constant force f is applied, retarding the upward motion of m1. If m1 = 5.30 kg and m2 = 10.60 kg, what value of f will reduce the acceleration of the system by 50%?

*asked by Rachel on October 25, 2009* -
## Physics

How come a heavy truck and a small car can both travel safely at the same speed around an icy, banked-curve road? I would think that since mass is increased, normal force is therefore increased, and force of friction is therefore increased. And since the

*asked by Hannah on October 20, 2010* -
## Biostats

I am having problems in this course with following the professor. Can anyone help me with this problem Thanks need to calculate 99% CI for true mean with the following data: n=100, mean is 126 with sample variance of 402. I have to know the answer,

*asked by Grace on June 8, 2007* -
## physics

a helicopter is ascending vertically with a speed of 5.20 m/s. at a height of 110 m above the Earth, a package is dropped from a window. how much time does it take for the package to reach the ground ? (hint: v0 for the package equals the speed of the

*asked by mary on April 15, 2012* -
## Physics

If 400 gm of aluminum are put into 200 gm of water at 20 C in 110 gr. calorimeter of specific heat .093, and the temp.or stable equilibrium is 28.8 C, what is the initial temperature of the aluminum? specific heat of aluminum is .22..

*asked by Lambo on December 6, 2012* -
## Accounting

March 3 Inventory units 60 per unit $1,500 total $90,000 March 8 Purchase 120 units $1,800 per unit total $216,000 March 11 Sal units 80 per units $5,000 total $400,000

*asked by Pat on August 28, 2011* -
## pprecalc

a windshield wiper on a a plymouth acclaim is 20 in. long and has a blade of 16in long. if the wiper sweeps through an angle of 110 degree, how large an area does the wiper blade clean?

*asked by greeny on October 3, 2012* -
## Chemistry

Suppose that you had a mercury-in-glass thermometer and calibrated to measure temperatures from -10 degrees C to 110 degrees C and you wished to measure a temperature of approximately 115 degrees C accurately. How might you use your thermometer to do it?

*asked by James on April 3, 2011* -
## Medical Information Management and office practice

At Allendale Psychiatric Hospital, the hospital census on January 4 is 110. According to the following data, what's the hospital census for January 5? Admissions 10 Discharges 2 A & D A. 99 B. 100 C. 108 D. 118 What is the correct answer?

*asked by jules on January 9, 2011* -
## math

The ratio of the tens digit to the units digit is 1:4. If the digits are reversed, the sum of the new number and the original number is 110. Find the original number by using a systems of equations with elimination

*asked by misa on September 11, 2008* -
## science

how do you do this question An aqueous solution of calcium chloride contains 2 grams of calcium chloride ( molar mass 110.98 g mol-1) in 100 ml calculate the concentration of chloride ion (Cl-) in the solution

*asked by Slaysliver on January 22, 2009* -
## chemistry

Given the following chemical reaction: Zn+HCl-->ZnCl2+H2(g) If you measured the total volume of collected gas over water at 20 degrees celcius t be 428ml at a total pressure of 845 torr, how many milliliters of 2.6M HCl would be required to produce the

*asked by regina on December 5, 2010* -
## engineering

in a proposed telesurgery application the image will be transmitted at 2*10^8m/s ovwe a roundtrip distance of 740km, the compression and decompression process for the images will take a total of 60m/s. what is the largest permissible value for the sources

*asked by Kenji86 on April 15, 2010* -
## physics

A light spring having a force constant of 110 is used to pull a 15.0 sled on a horizontal frictionless ice rink. The sled has an acceleration of 1.60 ? [2/27/12 9:41:56 PM] Matt Yeager: By how much does the spring stretch if it pulls on the sled at

*asked by Charlie on February 28, 2012* -
## geometry

An open rectangular glass tank with a horizontal base PQRS measures 80 cm by 50 cm by 34 cm. 110 liters of water is poured into the tank. v The tank is tilted towards edge PQ until the water just reaches the edge TU. w Calculate the value of d. s

*asked by pamela on June 19, 2012* -
## Algebra

Ms. Jones has two job offers as a car salesperson. At one dealership, she will receive $600 per month plus a commission of 2% of the total price of the automobiles she sells. At the other dealership, she will receive $1000 per month plus a commission of

*asked by Tucker on January 31, 2013* -
## Chemistry

I need to find out what the total acid concentration is in Kool-Aid. If 23.3 mL of 0.1043M NaOH neutralize a 60 mL solution of Kool-Aid (10 mL) and water (50 mL), what is the total concentration in a 10.00 mL aliquot of Kool-Aid? If you prepared a standard

*asked by Julie on February 15, 2011* -
## Early Child Ed.

Can you please check my questions and answers? 1. A three-year-old child who is developmentally delayed might: A. need training wheels on his two-wheel bike. B. speak in two-word sentences C. not be able to read. D. need someone to help cut his meat at

*asked by Tamera on July 12, 2007* -
## English

I included an introduction to 18th-century novels (is it correct?) + the features of Defoe's novels. Thank you. 1) Structure of his novels His novels are fictional autobiographies always pretending to be true stories. 2) They are preceded by a preface by

*asked by Henry2 on February 12, 2012* -
## financial math

Mary is buying several items that cost $128.25 total. She is using a store coupon for 35% off her purchases. She has to pay 4% sales tax. Calculate the total cost of the items.

*asked by Anonymous on January 24, 2013* -
## statistics

The pie chart below shows how the total annual income for a certain family is spent. If the total annual income is , what amount is budgeted for Savings and Insurance combined?

*asked by donna on January 4, 2016* -
## physics

What is the magnitude of your total displacement if you have traveled due west with a speed of 23 m/s for 125 s , then due south at 12 m/s for 255 s ? 2sf What is the direction of your total displacement in part A.

*asked by sintia on February 20, 2017* -
## algebra

a) Find a polynomial R(p) that represents the total revenue when the shirts are p dollars each. b) Find R(5), R(10), and R(20). c) Use the bar graph to determine the price that will give the maximum total revenue.

*asked by Anonymous on November 12, 2010* -
## Algebra/Word problem

media services charges $20 for a phone and $30/month for its economy plan. what is the total cost for 10 months service C(t)= 30t +20= total cost is $500 for 10 months?

*asked by Amy on September 8, 2010* -
## Accounting

Cupid Co. has total assets of $600,000 and its liabilities are equal to two-thirds of its total assets. What is the amount of Cupid Co.'s Owner's Equity? Please explain how you got this answer.

*asked by Anon on February 8, 2017* -
## math

Tim sells sneakers. He receives $9.75 an hour and 3% commission on sales. One week he works 24 hours and his sales total $1,879.95. What are his total earnings for the week ? Please help

*asked by sam on March 23, 2015* -
## Biology

Heterozygous tall and red flowered pea plants were selfed and total 2000 seeds are collected. What is the total number of seeds for both heterozygous traits?

*asked by Mini on March 5, 2018* -
## math

In December the average total rainfall in all of the deserts together is 0.89mm.Explain how to use the figures from the table to write a comparison of the total desert rainfall in August and December.

*asked by tiffany on March 31, 2011* -
## Math

A cashier has a total of 37 bills consisting of ones, fives and twenties. The number of twenties is 15 less than the number of ones. The total value of money is $191. How many of each denomination of bill are there? There are ___ ones, ___fives,

*asked by Dustin on September 6, 2016* -
## MATH

PLEASE HELP ME PLEASE I REALLY NEED HELP!!!!!!!! :-( Complete the table below.Draw the next few squares as needed.Write all ratios in simplest form. Shaded Blocks: 1 | 4 | 9 | 16 | 25 | | ----------------------------------------------------- Total Blocks:

*asked by Jen on November 28, 2013* -
## Math

Each week Rosa receives a salary of $200 plus a 6 percent commission on her total sales. To the nearest dollar, how much would Rosa have to sell in one week to earn a total of $300

*asked by Stephanie on October 21, 2017* -
## Physics

Three charges q1= 2uc(0,0)cm q2=4uc(0,10)cm and q3=_3uc(15,0)cm acts on one another, find the magnitude of the total electric force and the angle that the total electric force makes with positive x_axis.

*asked by Gboss on July 22, 2018* -
## Algebra

Write a system of equations to model the problem and solve the system: Benjamin has nickels and dimes and his toy bank he has a total of 45 coins the total value of $3.60. How many coins of each kind does he have?

*asked by Brianna on November 27, 2014* -
## Business math

what the rebate of the finance charge and payoff would be if the pickup truck loan were paid off after 27 months instead of 60. Total of monthly payments 60 x 194.38. I don't know how to get the total finance charge

*asked by Rebecca on November 14, 2010* -
## Physics

A car goes North at 55mi/hr for 1.3 hrs. It then goes East at 65mi/hr for 45 min. What is the total distance travelled, total displacement,average speed and average velocity of the car?

*asked by Erica on September 9, 2016* -
## Algebra

Write a system of equations to model the problem and solve the system: Benjamin has nickels and dimes and his toy bank he has a total of 45 coins the total value of $3.60. How many coins of each kind does he have?

*asked by Brianna on November 27, 2014* -
## Albegra

Tickets to a school play were sold for $3.50 for each adult and $2.00 for each child. A total of 325 people attended the play and the total amount that was taken in was $875. How many of each kind of ticket was sold.

*asked by Lurye on October 23, 2015* -
## Math Trivia! :)

Three friends arrive at an In late one night and rent a room for $30 (each of them contribute $10). THe next mornnig, the Innkeeper decides to give them a $5 discount because of a leak in the roof. Since he can't split the $5 evenly, he gives each of the

*asked by Dawn on February 14, 2011* -
## Algebra

A baseball player hits a foul ball straight up in the air from a height of 4 feet off the ground with an initial velocity of 85 feet per second. When is the ball 110 feet off the ground?

*asked by Ashley on December 7, 2016* -
## math

The time required to finish a test in normally distributed with a mean of 80 minutes and a standard deviation of 15 minutes. What is the probability that a student chosen at random will finish the test in more than 110 minutes?

*asked by chelsa on May 31, 2011* -
## Algebra

A map of Utah has a scale of 1 cm:30 mi. The border of Utah and Wyoming measures about 3.7 cm. How long is the actual border of Utah and Wyoming? Round the answer to the nearest 10 miles. I think it's 110 mi. Am I right?

*asked by Hal on November 10, 2016* -
## physics

Two sound sources radiating in phase at a fre- quency of 540 Hz interfere such that maxima are heard at angles of 0◦ and 21◦ from a line perpendicular to that joining the two sources.

*asked by Anonymous on March 8, 2011* -
## Summer School Calculus

Add the following vectors , 7m/s [N30E] and 2m/s [S17E], using trigonometry. Once you draw these out into diagrams, you use the triangle law yes? How do you find the angles to use in the cosine and sine law? A little confused, thanks for the help.

*asked by Derek on June 29, 2008* -
## Physics

A loudspeaker of mass 20.0kg is suspended a distance of h = 1.60m below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 4.00m .

*asked by Anonymous on September 30, 2013* -
## Math

The directions that came with the kite pattern that Andre ordered on the internet said to cut out 2 supplementary angles so that the measure of one is twice the measure of the other. How many degrees are in each angle? Justify your answer.

*asked by Jenny on February 18, 2014* -
## physics

A girl uses a spanner of length 20cm to tighten a nut. IF she pulls at right angles to the end of the spanner with a force of 50N, calculate the moment of her pull

*asked by atiyya on November 23, 2016* -
## phys.

the shortest and longest wavelength series in singly ionized helium is 22.8nm and 30.4nm . Are they right? How many orders we can see between the angles range observations 30 and 90 in the Balmer's series?

*asked by bun on December 8, 2009* -
## geometry

If four angles of a convex pentagon measure 120°, 93°, 108°, and 101°, find the measure of the fifth angle. Show equations and work that lead to your answer.

*asked by sharon on January 8, 2012* -
## math

calculate the measures of the point angles of the star-shaped polygons shown. I know you can see the firgure but its 140 degree angle. To measure them do I do 360/140=2.57?

*asked by Alvin on April 7, 2010* -
## trig

Find all angles θ between 0° and 180° satisfying the given equation. (Enter your answers as a comma-separated list. Round your answers to one decimal place.) cos θ = 1/7

*asked by stellar on September 30, 2011* -
## physics

A girl uses a spanner of length 20cm to tighten a nut. If she pulls at right angles to the end of the spanner with a force of 50N,calculate the moment of her pull

*asked by atiyya on November 19, 2016* -
## trig

TA and TB are two cables helping to brace a 500 ft radio tower, FT. If the angles which the cables make with the horizontal are 62 and 50 (degrees), find the distance between their anchor points

*asked by Michael on May 10, 2010* -
## Right angle trigonometry

A sailor sights both the bottom and top of a lighthouse that is 20 and m high and which stands on the edge of a cliff. The two angles of elevation are 3 and 42. To the nearest meter, how far is the boat from the cliff?

*asked by Kayla on April 25, 2013* -
## physics

a fire hose hold near the ground shoots water at speed of 6.8 m/s at what angle(s) should the nozzle point in order that the water land 2 dm away why are there two diffent angles?

*asked by kit flores on September 6, 2014* -
## Math

Which of the following conditions does not ensure that a quadrilateral is a parallelogram? A) Both pairs of opposite sides are parallel. B) The diagonals bisect each other. C) A pair of opposite angles are congruent. D) All of the above Can anyone tell me

*asked by Justin on May 23, 2010* -
## Trig

Find all angles θ between 0° and 180° satisfying the given equation. (Enter your answers as a comma-separated list. Round your answers to one decimal place.) Sin θ = 1/4

*asked by Amanda on November 9, 2015* -
## Pre-Algebra

Can someone help me with this one- Quadrilaterals are a special type of polygon because _______________. A. they always have exactly four sides B. the sum of their interior angles always measures 180° C. they always have opposite sides that are parallel

*asked by mysterychicken on May 26, 2009* -
## English

Hello. I would highly appreciate some language help from a native speaker of English. Do you think the following sounds natural English: 1)the topicality of the present study is prompted by the fact that... (maybe the word "relevance" is better here?)

*asked by Nalmi on December 7, 2013* -
## Managerial accounting

Han Products manufactures 30,000 units of part S-6 each year for use on its production line. At this level of activity, the cost per unit for part S-6 is as follows: Direct materials $ 3.60 Direct labor 10.00 Variable manufacturing overhead 2.40 Fixed

*asked by kim on September 16, 2011* -
## college trig

From a point on the ground a person notices that a 110-ft tree on top of a hill subtends an angle of 3°. If the angle of elevation to the bottom of the tree, represented by angle A in the figure below, measures 37°, find the height h of the hill

*asked by smith on March 27, 2010* -
## Physics

4) if the speed limit on highways changed from 100 km/hr to 110 km /hr,how much more distance would a car need to speed: A) on dry roads*0.06 B) on wet roads *0.10 C) on icy roads *0.15 *Note convert from km/hr to m/s ,multiply by 0.278 Or m/s to km/hr

*asked by LIily on December 13, 2015* -
## Calculus

a rectangular box of given volume is to be "a" times long as it is wide. find the dimension for which it has the least total surface area ? L= aw Total surface area= 2LW + 2Lh + 2Wh = 2aw^2 + 2awh + 2wh But volume= lwh= 2aw^2 h or h= V/2aw^2 Total Surface

*asked by Hero on December 10, 2006* -
## Algebra

A bank teller counts her $10 and $5 bills at the end of the day. The total value of the money is $595. Let f represent the number of $5 bills. I have to write an equation that represents the total value of the money. I know f = 5 and 2f = 10 but I am stuck

*asked by Kristen on May 5, 2015* -
## math forgot questions

a new refrigerator costs $2495. It may be purchased for $95 down and 24 monthly payments of $125 eachI forgot questions What is the total cost of the refrigerator if you finance it? b) What are the finance charges (total interest)?

*asked by jean on July 7, 2012* -
## Math Help!

Giving a test to a group of students, the grades and gender are summarized below A B C Total Male 17 5 2 24 Female 7 11 12 30 Total 24 16 14 54 If one student was chosen at random, find the probability that the student was female.

*asked by Anonymous on October 1, 2016* -
## algebra

Giving a test to a group of students, the grades and gender are summarized below A B C Total Male 12 8 3 23 Female 19 18 4 41 Total 31 26 7 64 If one student is chosen at random, Find the probability that the student was NOT a male that got a "A"

*asked by rosia on May 8, 2018* -
## Probability Help ASAP!

Giving a test to a group of students, the grades and gender are summarized below A B C Total Male 17 5 2 24 Female 7 11 12 30 Total 24 16 14 54 If one student was chosen at random, find the probability that the student was female.

*asked by Amanda on October 1, 2016* -
## MATH HELP ASAP

Giving a test to a group of students, the grades and gender are summarized below A B C Total Male 18 16 8 42 Female 7 17 9 33 Total 25 33 17 75 If one student is chosen at random, Find the probability that the student was NOT a female that got a "A"

*asked by Amanda on October 1, 2016* -
## Math

I'm confused.Can someone tell me if I have done this correct.I'm trying to get the average using a weighted scale: TOTAL GRADES: WEIGHT 90% ---------- 5% 100% ---------15% 95% --------- 15% 90% -----------5% 94.5% --------60% I multiplied the total grade

*asked by Sue on May 3, 2010* -
## Statistics

I'm confused.Can someone tell me if I have done this correct.I'm trying to get the average using a weighted scale: TOTAL GRADES: WEIGHT 90% 5% 100% 15% 95% 15% 90% 5% 94.5% 60% I multiplied the total grade by the percent, then added the percent. But I get

*asked by Sue on May 2, 2010* -
## Business Excel

I need help with BIS 155 Data Analysis with spreadsheets final exam. Total of 5 essay questions. Must write a total of 250 words per questions. This class is a excel class.

*asked by Jacqueline on August 18, 2011* -
## algebra

Julie and two friends babysat for 5 hours yesterday. They divided their total earnings equally. Julie spent $8 from her part of the money and had $11 left. What was the total amount the three friends earned?

*asked by ann on October 31, 2014* -
## economics

what is the price index for 2007 when $675.00 is total expenditure for that year and $600.00 for 2006. These total expenditures comes from a fixed market basket of goods. How do you calculate price index?

*asked by DV on February 1, 2008* -
## Math Help!

Giving a test to a group of students, the grades and gender are summarized below A B C Total Male 17 5 2 24 Female 7 11 12 30 Total 24 16 14 54 If one student was chosen at random, find the probability that the student was female.

*asked by Anonymous on October 1, 2016* -
## chemistry

What is the concentration of IO3- (total volume: 20mL) when you have .00001mol of HSO3- (total volume: 10mL)? Use the balanced equation IO3-(aq)+3HSO3-(aq)>>>I-(aq)+3SO4^2-(aq)+3H+(aq)

*asked by jessica on May 1, 2016* -
## sales tax

here is my problem. The tax rate in a certain state is 5% Find the total price payed for shoes that cost 52 dollars Total price = cost + salestax =52 + 52*.05 =52+2.60

*asked by masha on August 9, 2005* -
## math

Sam decides to buy 100 shares of ABC company. They cost $26.25 a share. The commission is 5% of the total price. What is Sam's total cost?

*asked by Anonymous on April 12, 2014* -
## Math

Referring to the experiment of rolling two fair dice, let A be the event that the total is less than eight and let B be the event that the total is even. Draw a Venn diagram corresponding to this experiment and events A & B (using probabilities). 1

*asked by Leslie on February 14, 2013* -
## Math

Referring to the experiment of rolling two fair dice, let A be the event that the total is less than eight and let B be the event that the total is even. Draw a Venn diagram corresponding to this experiment and events A & B (using probabilities). 1

*asked by Leslie on February 14, 2013* -
## Math

The math question is "in a piggy bank there is a total of $15.75. If the ratio of dimes to quarters is 5:7, find the total amount in quarters. My question is, what formula would I use to solve this?

*asked by michelle on February 19, 2015*