# Posts by josh

Total # Posts: 1,884

Algebra
I have to compute the determinant of the matrix without using a calculator. If the determinant is zero, write singular matrix. 1 -1 -1 -4 2 0 0 3 1

algebra 1
yes

math
160 blocks , each block is 2 cm wide, 1 cm long & 4 cm high, what will be size of box that will hold all 160 blocks (each side cannot be less than 6 cm)

Math
What are the measurements of a box that will hold 160 blocks that are 2 centimeters wide, 1 centimeter high, and 4 centimeters long?

physics
32 kg child practicing rock climbing, she feel but the rope hung on with a tension of 253N. find acceleration??

Science
Some herbicides, such as 2, 4-D are believed to make plant cells divide more rapidly than normal. Why would this kill plants? Why might this be dangerous to humans if it had the same effect on human cells?

science-biology
Some herbicides, such as 2, 4-D are believed to make plant cells divide more rapidly than normal. Why would this kill plants? Why might this be dangerous to humans if it had the same effect on human cells?

life orientation
Discuss in a paragraph of 150 words in which one can take responsibility to provide safe abd healthy livinf enviroment.

Math
I am an amateur, so my answer might not be correct. If I understand this right, you are talking about a non-shaded box, 8x2, inside a larger, shaded box, 10x4. The area of the inner box is 16. The area of the outer box, 40. 40/100 = 16/x x = 1600/40 x = 40 The area of the ...

PHILOSOPHY
Check out Jeremy Bentham (1748-1822), "An Introduction to the Principles of Morals and Legislation" Chapters III and IV.

Biochemistry
In yeast, ethanol is produced from glucose under anaerobic conditions. What is the maximum amount of ethanol (in millimoles) that could theoretically be produced under the following conditions? A cell-free yeast extract is placed in a solution that contains 3.50 × 102 ...

trig
I see. A trailing ,numer; works. For asin(.8), asin(.8)*180/%pi, numer; produces 53.13... I also found that writing numbers with a trailing .0 forces approximation. And for the built-in constants, float() forces approximation. For example: a: 4.0/5.0\$ disp(a)\$ b: asin(a)\$ ...

trig
Using b+0 doesn't phase it. The problem is getting wxMaxima to make 4/5 into a decimal. If I use a: 0.8\$ b: asin(a)\$ print("the angle is ", b)\$ Then it works. It gives me the angle is 0.92729521800161 But if I try to convert that to degrees: c: b*180/%pi\$ print(&...

trig
I am trying to get wxMaxima to give me arcsin(4/5), either in radians or degrees. I am using a: 4/5\$ b:asin(a)\$ print("the angle is ", b)\$ But it returns the angle is asin(4/5) How do I get wxMaxima to give me the angle? I want .927 radians or 53.1 degrees.

Physics
I am not an expert. I am a very rusty amateur, so this has to be checked. But I think the difference in light travel distance you are talking about measuring is 2mm. That is, 1mm out into some 1mm deep feature in the object, and 1 mm back. Plus the 2 km there and back. But ...

math
Ok.. "The strongest recorded earthquake in the world took place in Child on May 22, 1960. It had a magnitude of 9.5 on the Richter scale. The strongest quake actually recorded in Canada was magnitude 8.1 on August 22, 1949 and occurred off the Queen Charlotte Islands. a)...

Statistics
If the average IQ is 100 with a standard deviation of 10, what percentage of the population has an IQ of at least 116?

math
yes,i did,thanks

math
row a;1,2,3,4,5............................rowb;1,2,4,8,16...........................row c;2,4,7,12,21.........................what is the first entry in row c which is greater than 100 is most likely to be ?

math
john is the age that sally was 3 years ago,13 year old elissa is 3 years older than sally,how old will john be on his next birthday?

math
tom,jack and joe are the fastest runners in the school.if they race one another,without dead heats,how many combinations can they finish in if they occupy the first 3 places ?

math
in how many different orders can 4 children be arranged in a line,if john and julie refuse to stand next to one another ?

Math
Justin rides his bike in a rectangular route. He knows the total distance is 6,188 yards and the length of the shorter side of the route is 741 yards. What is the length of the longer side ?

Chemistry
1. If a student forms CaCO3 from the presence of carbon dioxide, but continued with the trial anyway, how would this affect his/her calculations (too high, too low, or no effect)? Explain your answers. a) The volume of NaOH required for the back titration. b) The calculated ...

Chemistry
4. A 5.309 g antacid tablet, with CaCO3 as the active ingredient, was mixed was 30.0 mL of 0.831 M HCl. It took 15.3 mL of 0.7034 M NaOH to neutralize the excess acid. a) Calculate the volume of HCl neutralized by the NaOH. b) Calculate the amount of HCl (in mL) neutralized by...

physical science 2nd semester
what is the reactant in this equation ?2HBr(aq)+ca(OH)2(aq)-->2H2O(i)+CaBr2(aq)

physics
[radius (perpendicular) * sin35º] / [radius perpendicular*cos 35º] -the radius cancel and your left with.... sin35º / cos35º =.70 is the coefficient of static friction

trig
I keep trying to find the power reducing formula for sin^4(x), but I can't seem to get all the fractional parts correct. The answer I should be getting is: sin^4(x)=(1/8)cos4x-(1/2)cos2x+(3/8) I can only get this far knowing feeling confident. When I go further I start ...

Chemistry
What volume (L) of 0.256 M potassium hydroxide solution would just neutralize 61.3 ml of 0.167 M H2SO4 solution?

Chemistry
What volume (L) of 0.256 M potassium hydroxide solution would just neutralize 61.3 ml of 0.167 M H2SO4 solution?

Math
How do you change 5x15 into distributive property?

math
A nurse needs to make 30 ml of 5% solution of glucose. She has available bottles containing 5 ml of 7% solution and bottles containing 10 ml of 1% solution. How many 5 ml bottles and 10 ml bottles will she need to make the solution? Bottles of 5 ml of 7% solution needed: ...

Math
A rectangular plot, 21m by 14m, is to be turned into a rectangular flower bed with a grass border around its outside edge. The grass border is to be 2m wide. What is the area of the flower bed? What is the area of the grass border?

Science- chemistry
fuzzy silver coating is impure silver. it can be converted back into silver nitrate by reacting it with nitric acid what has been done to the reaction mixture to recover solid silver nitrate?

chemistry
copper compounds such as copper (II) sulfate are toxic. before disposal, these compounds must be treated to reduce their toxicity. describe how to use steel wool to remove the Cu 2+ ions from an aqueous solution of copper (II) sulfate

math
Find three consecutive intergers whose product is 33 larger than the cube of the smallest integer.

algebra one
3(x+6) > 4(x-2) x is the number your looking for since it says greater than you need to place an inequalities sign above is how it should look just solve to get x by itself good luck

algebra one
-3(x+7) < -11 sounds like an inequality like what's depicted above again replace the number with a variable such as x and think about how the operations are correlated with the words now just solve to get x by itself, remember when you divide by a negative the sign will...

Grammar
You should try combining sentences that correspond or have similar subjects. Take the first two sentences could be combined since the second sentence describes what those model trains were like. The third and fourth sentences could also be combined since you could say although...

Algebra 2
Objective Function: C = 6x – 4y

Physics
A 3.0 kg block slides down a 4.5 m ramp of angle 30 degrees and collides inelastically with a 4.5 kg bolck at rest. Calculate the velocity after the collision.

Math(Data Management)
of the 11 girls in class: 6 dislike Trevor(T), 5 Dislike Bryce(B), 8 Dislike Drake(D), 3 Dislike T and B, 5 Dislike T and D, 4 Dislike B and D only Sue-Ellen is friends with all 3, place students in Venn Diagram and Find the Number and Describe?

english
We can touch different objects and feel things!! Or we can fix things n clocks can't, i don't know

english
What is a personification expression for hands on a clock?

Physics
High-speed stroboscopic photographs show that the head of a 197 g golf club is traveling at 36.8 m/s just before it strikes a 45.9 g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 25.9 m/s. Find the speed of the golf ball ...

physics
A soccer ball with a mass of 415 g bounces off the crossbar of a goal and is deflected upward at an angle of 57° with respect to horizontal. Immediately after the deflection, the kinetic energy of the ball is 47 J. What are the vertical and horizontal components of the ...

Physics
Betty weighs 427 N and she is sitting on a playground swing seat that hangs 0.22 m above the ground. Tom pulls the swing back and releases it when the seat is 0.88 m above the ground. The acceleration of gravity is 9.8 m/s2. Betty is moving 3.5967 m/s when the swing passes ...

Tuck Everlasting/Natalie Babbit
is this right Toad-Freedom metamorphosis life growing and changing Wheel-Life flows round and round life and death endless rotating wheel life keeps going on and on Music box-Happiness and peacefulness tree symbol of life

Tuck Everlasting/Natalie Babbit
WHat are the symbols in this book. Tree Wheel Water Toad

TUck everlasting/Natalie babbit
WHat are the symbols in Tuck Everlasting?

math
Simplify using Pascal's Triangle: state a term number of formula and a value. What term number (Tn,r)is your answer? find the sum of row 12? I know that the sum is 2^12=4096, how would you find the term number?

Math
nate owes michael 5.00 nate expressed how much he owes as an integer Michael expressed how much nate owes him as an integer what do the two integers have in common

Biology
You are studying a large population of claims of which 396 are pink (t) and 557 are Tan (T). Tan clams are completely dominant over pink clams. Calculate the following: 1. The frequencies of each allele. 2. The expected genotypic frequencies. 3. The number of heterozygous ...

Physical science
How much energy would be needed to warm 1.5 L of water from 0 °C to 25 °C? The specific heat capacity of water is 4186 J/kg/°C.

physical science
How much energy would be needed to warm 1.5 L of water from 25 °C to 50 °C? The specific heat capacity of water is 4186 J/kg/°C.

physics
A rifle is aimed horizontally at a target 46.0away. The bullet hits the target 2.30 below the aim point. What is the bullet's flight time? What is the velocity as it leaves the barrel?

algebra 1a
12 + y -------- 36 + w

Physics
A crate of mass 59 kg is attached to one end of a string, and the other end of the string runs over a pulley and is held by a person as in the figure below. If the person pulls with a force of 94 N, what is the crate's acceleration?

Math Homework
In a clinical trial, a drug used to relieve pain caused side effects in 2% of the patients who took it. For a new trial, three patients were selected at random. Find the probability that all three of the patients had side effects

Math
Account numbers for Northern Oil Company consist of seven digits. If the first digit cannot be a 0 or 1, how many account numbers are possible?

3 divided by 0.5 which is 6

math
Alice is giving a book as a gift that is 8 3/8 inches long and 6 1/2 inches wide. Will the book fit in a box that is 8 1/2 inches long and 6 1/2 wid or in a box that is 8 inches long and 6 inches wide?

physics
sphere A has a mass of 4.2*10^-2 kg and is tethered to a wall by a thin thread. Sphere a has an excess of 1.2 *10^12 electrons. Sphere B has a deficit of 3.5*10^12 electrons and is o.23 m from sphere A a) determine the angle between the thread and the wall b) determine the ...

math
a farmer plant seeds in a field that is 125 meters length and 75 meters width. The seed must receive 1 liter per square meter every day and how many liters must farmer apply to the field every day?

Math
13/100

geometry
The Polygon Angle-Sum Theorem states the following: The sum of the measures of the angles of an n-gon is ____. (1 point) (n – 1)180o (n – 2)180o 9. What is the measure of one angle in a regular 16-gon? (1 point) 2,520o 202.5o 157.5o 78.75o 10. The measure of each ...

calculus
can someone please help me find all the zeros of the following polynomial. write the polynomial in factored form. f(x)=x^3-3x^2+16x-48 can you please show all work

calculus
how do I test the different regions??

calculus
solve the following inequality. write your solution in interval notation. x^3+9x^2-108 less than or equal to 0 please show all work

Math
A street is 282 m long is covered with snow. City workers are using a snowplow to clear the street. A tire on the snowplow has to turn 47 times in traveling the length of the street. What is the diameter of the tire?

physics
The coefficients of static and kinetic friction between a 50 kg box and a horizontal surface are 0.64 and 0.17, respectively. (a) What is the acceleration of the object if a 335 N horizontal force is applied to the box? m/s2 (b) What is the acceleration if the applied force is...

Physics
The coefficients of static and kinetic friction between a 50 kg box and a horizontal surface are 0.64 and 0.17, respectively. What is the acceleration of the object if a 335 N horizontal force is applied to the box?

Math
how do you change equivalent fractions with a common denominator

math
order the fractions from least to greatest 7/10 9/20 4/5

physics
a ball is thrown vertically upward at a speed of 45 m/s. how long does it take to return to the ground?

physics
A brother (mass 20 kg) and his big sister (mass 32 kg) want to play on a teeter-totter. The beam is 7 m long and has a mass of 41 kg. Suppose the brother sits at the end of his side, 3.5 m away from the pivot point. How far away from the pivot point does the sister need to ...

Physics
A 84 kg runningback is running at 3.5 m/s. The running back is met by 152 kg defensive lineman. If the collision between the runningback and the defensive lineman results in both coming to a stop, find the speed(absolute value) that the defensive lineman was moving at.

Algebra Two
Write the expression in simplified radical form. 2-2Square root 3 over 7+ square root 3

Algebra 1
4+9y-3>9y+6

Math - percent of a #
How do work this problem? 50% of what number is 46?

Algebra 2 Rational Equations
What is the solution set of the equation? I know the answer is {-1} I just don't know how to get there. X^2-16 x-3 --------- = ------- -1 (x+4)(x+2) (x+2)

ap chem
A calorimeter contains 20.0 of water at 12.5 . When 2.20 of (a substance with a molar mass of 59.0 ) is added, it dissolves via the reaction and the temperature of the solution increases to 27.5 . Calculate the enthalpy change, , for this reaction per mole of . Assume that the...

Chemistry
A propane stove burned 470. grams of propane and produced 625 milliliters of water. What is the % yield? C₃H₈+5O₂ -> 3CO₂+ 4H₂O

English
In class today we went over subordination an the different forms, but I'm still confused about subordination when it comes to the absolute and infinitive forms. How do you subordinate in these forms?

precalculus
Just plug in the height of 36 ft into the equation given for the height, then you can solve for t by subtracting 36, then dividing by 16, and square rooting your answer (make sure to take the positive square root).

Math word problem
10killograms

math
5/12 of my salary was spent on food, then I gave 3/7 of the remainder to my sister and had P856 left. How much did i spent for food? 4 units = ? 1 unit = ? food has 5 units = ? ?

english
I also agree with yours.

Physics
A baseball is thrown such that it is in the air for 4 seconds and lands 100 m away. Find the initial vertical and horizontal components of the baseball's velocity.

Physics
A bolt requires 15 Nm or torque to loosen it. How much force needs to be applied to a 20 cm long wrench to loosen the bolt? Assume the force is applied perpendicular to the handle of the wrench.

Physics
What is the orbital speed of a satellite of mass 490 kg in geostationary orbit?

physics
A crate of mass 96 kg is loaded onto the back of a flatbed truck. The coefficient of static friction between the box and the truck bed is 0.14. What is the smallest radius of curvature, R, the truck can take, if the speed with which it is going around a circle is 2.9 m/s?

math
Hannah's grade on her last math test was 4 points more than Mark's grade. Write an expression for Hannah's grade, using m as a variable. Evaluate the expression if m=92.

science
how much skin covers 1 of your alveoli?

English
Correct

Economics
(This homework question was removed due to a copyright claim submitted by K12 Inc.)

math
My hundredths digit is the product of 3 x 2. My tenths digit is the multiple of 3 that comes before the digit that is in the hundredths place. My thousandths digit could not be any greater. What number am I?

elementary
nuber sense minnie has 6 county cds and 5 rock cds.amanda has 5 rock cds and 6 country cds.who has more cds?explain.