# Math

## Recent Questions

**math**

The decay of uranium is modelled by D = D_0 * 2^(-kt). If it takes 6 years for the mass of uranium to halve, find the percentage remaining after: a. 2 years

**math**

In a controlled breeding program at Melbourne Zoo, the population (P) of koalas at t years is modeled by P = P_0 * 10^(kt). Given P_0 = 20 and k = 0.3: a. calculate the number of koalas after 2 years b. determine when the population will be equal to 1000

**math**

How many centavos are equal to P2.50?

**math**

2005 2006 2007 2008 Plant 1 20 4 25 10 Plant 2 25 5 5 48 Plant 3 20 8 20 32 Plant 4 43 10 10 47 Plant 5 40 11 15 48 For which year is the mean the BEST measure of central tendency? A) 2005 B) 2006 C) 2007 D) 2008

**Math**

How to use a model for 5/8 divided by 2/3

**math**

Big Question: To rationalize a fraction means to remove all non-rational numbers from the denominator of the fraction. Rationalise (a^2)/(3+√b^3) by multiplying the numerator and denominator by 3 − √b^3, and then evaluate if b = a^2 and a = 2. Show all of your working.

**math**

A,B,C contract a work for 1020.together A and B are supposed to do 9/17 of work.how much C get? ans 480rs

**math**

I am a 2-digit number. My ones is 3 more than my tens and the sum of my digits is 11. What number am I ?

**math**

.) Dino gathered 72 eggs from one poultry house and 48 from another. How many more eggs did he gather from the first house?

**math**

I am a 2 digits number. My ones is 3 more than my tens and the sum of my digits is 11. What number am I?

**math**

how many centavos are equal to P2.50

**green Field academy math**

Half The length of Jane's garden is 15metres find The length of the garden

**math**

how many numbers are greater than 22 but less than 32?

**Math**

Find the minimum number of terms in the geometric series 10 + 8 + 32/5 + ... such that the sum is greater than 49.

**Math**

An arithmetic series has first term -50 and common difference 4. How many terms are in the series so that the sum of the series first exceeds 100?

**Math**

In an arithmetic progression, the 5th term is six times the 1st term and the sum of the first six terms is 99. Find the 1st term and the common difference. Attempt at solution: U5 = 6(U1) 99 = 3(2[U1] + 2d)

**math**

Solve for x and y if 5^(x−y) = 625 and 3^(2x) × 3^y = 243. (note: I posted a similar question to this before, but this uses indices) (Also note: Answer is, x = 3, y = -1 ; 7, and the question if inputted into an online calculator, is incorrect.) Thnks for your time.

**Math**

What would be the transformations in this function y= -x+14? Would it reflect over the y or x -axis? It is also vert. up 14.

**Math**

What do you get when you mix a snowman and a wolf?

**Math**

What is the parent function of x=2?If y=2 is a constant.So f(x)=a. would be the parent function of y=2. Would x=2 also be a constant since it is just going vertical instead of horizontal?

**Math**

(x-3)^2+(y-3)^2=8.75 What would be the transformations on this circle? I know the center is (3,3) so would it be vert. 3 up and horizontal 3 to the right? Or is it be different since it has a diameter.

**Math**

1) a. Miguel says that you can easily separate numbers divisible by 2 into two equal parts. Do you agree? Why or why not? 1) b. Many says that if Miguel is correct, then you can easily separate numbers divisible by 3 into three equal parts. Do you agree? Why or why not? 1) c. ...

**math**

So I don't have a question I just wanted to wish all of the Jiskha tutors a very Happy Thanksgiving! All of the Students that use this site really appreciate all of the help. Thanks you all for checking our questions, and explaining materials to us when we don't quite ...

**Math**

Lian uses 200 tegular paces to walk around a square park.if one pace of lian measures 40 cm,what is the measure of each side of the park

**Math**

Darryl used a total of 715.75 kilograms of flour to fill bags at a ocal flour mill. HE used 22.68 kilograms of flour to completely fill each nag. What is the greatest number of bags Darryl completely filled? A 33 B 32 C 31 D 30 My answer C am i correct?

**Math**

Erin is 1/3 the age of Connor. 3 years ago the sum of their ages was 38. How old is Erin today?

**Math**

Azeem bought 30 dozen eggs. Out of which 30 eggs were rotten. If he bought it for Rs 1800. What should be the selling price of each egg to get a profit of one rupe per egg. Please explain it I can't get it

**math**

Solve for n: ((3^n)^n*(3^n)^-1) / 81 = 1 Answer (n) = -1, 4 I have no idea how n = -1, 4. Also, please don't ask if the answers are actually wrong or not, they are directly from the text book.

**math**

Solve for x and y if 5x−y = 625 and 32x × 3y = 243. Hence, evaluate 35x/7^(−2y) × 5^(−3y) Need help for solving x and y, thanks!

**Math**

Azeem bought 30 dozen eggs. Out of which 30 eggs were rotten. If he bought it for Rs 1800. What should be the selling price of each egg to get a profit of one rupe per egg.

**Math**

A company makes batteries with an average life span of 300 hours with a standard deviation of 75 hours. Assuming the distribution is approximated by a normal curve fine the probability that the battery will last . Less than 250 hours b. Between 225 and 375 hours c. More than ...

**math**

Solve the inequality. 1. –6w < 84 w > 14 w < –14 w > –14 w < 14

**Math**

In a class of 40 children, 16 of them wear glasses. What fraction of the children wear glasses?

**math**

-3y>9 a) y<3 b) y>3 c) y<-3 d) y>-3

**math**

Ron walked at a speed of 8km/h for 20min. what was the distance covered? please can you show your calculations :D

**Math**

How many 8 in Long ribbons can Mona make from a 4ft piece of material

**math**

when price of article was decreased by 12%, 2 more articles could be bought for rs2160.find original price of article?

**History**

What could be some examples of peace in the Gupta Empire? I have found that peace allowed for many achievements in science and math. Could someone explain to me more about peace in the Gupta Empire?

**math**

A shop-keeper sells onions at Rs 24, Rs 30 and Rs 42 a kilogram, selling the different kinds in quantities proportional to 1: 1: 3. If the total quantity sold be 60 kg, the average price obtained for each kg is:

**Math**

JajA had three ribbon with her . The length of the green ribbon qas2/1/2 times the red ribbon.what is the length of the yellow

**math**

Tingles wants to sell potato chips in cylindrical containers. So the chips do not fall out the containers will have ends. To be environmentally conscious, the company president wants to make the container entirely out of cardboard. Furthermore, they will choose the cylinder ...

**math**

If we take 4 round a field that is 160 long 90 my wide what's is the distance we walk in kilometres

**math**

Lea is two years older than Mia.The sum of their ages is 20.Find their present ages.

**Math**

A pile of blocks has 40 blocks in the bottom row 36 blocks in the second row 32 blocks in the third row and so on until there are only 4 blocks on the top row how many blocks? Are there in the 7th row? How many blocks are there in all

**math**

A piece of cloth is sold for rs85.80 at a profit of 30%. if it had been sold at rs 7.50 per m ,the profit would have been rs 16.50.the length of the piece is ?

**math**

A shopkeeper bought pens at a rate of 12 pens for 150 rs and sold them at rate of 10 pens for 130rs.The number of pens he should sell to earn a net profit of 20rs is?

**math**

A shopkeeper allows a discount of 10% on the marked price of a commodity which he bought at 540rs.Had he sold at marked price,he would have made a profit of 210rs.what is present sp of a commodity? ans(675rs)

**Math & a bit of Physics**

A block of mass 11 kg is at rest on a rough plane inclined at 30° to the horizontal. A force acts on the block in a direction up the plane parallel to a line of greatest slope. When the magnitude of the force is 2X N the block is on the point of sliding down the plane, and ...

**Math**

A machine produces 75 widgets an hr how many widgets would the machine produce in six mins

**math**

Find the perimeter of a rectangular area with a length of 13 inches and a width of 7 inches. Calculation With Distribution (Show all steps.) plase help me i dont know how to do this with distribution

**Consumer Math**

*** is my answer When calculating intrest on a cd you ____? A. multiply the principal by the intrest rate B. multiply the principal by the intrest rate and time*** C. use an online calculator D. multiply the principal by time

**Math**

Graph the inequality: x <-2 -

**math**

what digits makes 345 divisible by 2

**math**

An employee earns $61.75 for working 6.5 hours. How much does the employee earn per hour?

**Math**

The LCM of 30 and 40 is 120. (Least common multiple) Is that correct....

**Math**

The minute hand of a clock is 6 cm long. How far does the end of the hand the hand of the hand travel in 35 minutes

**Math**

1. 2(y + 1) for y = 2 (1 point) 6 5 7 8 2. start fraction lower d plus lower g over lower h end fraction for d = 29, g = 16, and h = 9 (1 point) 8 2.375 5.375 5 3. The cost in dollars of a school banquet is 74 + 12n, where n is the number of people attending. What is the cost ...

**Math**

There were 60 apples in a box 3/4 were green how many green apples were there I need help in thy is please help me☹️

**Math**

The top of a table measures 2m25cm by 1m 20cm find its area in square metres

**math**

least to greatest 0.07 3/50 0.1

**math**

The length of a room is double its breath. Its height is 5m the area of four walls ( including the door and windows) is 210sq m. Find its volume solve this sum

**math**

The length of a room is double its breath. Its height is 5m the area of four walls ( including the door and windows) is 210sq m. Find its volume solve this sum

**math**

2^(2x)-5(2^x)=-4 Need help with the whole question, thanks!

**math**

In a random sample of 80 ears of corn, farmer Carl finds that 11 of them have worms. Carl claims that less than 20% of all his corn has worms. Test this claim at the 0.05 significance level. (a) What is the test statistic? zp̂ = (b) What is the P-value of the test statistic...

**math if your a genius solve this**

Students at a school are planning a school trip to New Jersey. They have gathered the following information about the cost. The price of round trip airfare for each person is $600 The cost of hotel room is $60 per night per student and twice that per night per adult. A. Find ...

**Math**

Solve the inequality. Explain all steps and identify the properties used. n/-3+5>4 Pleasr help I can't figure this out and my grade depends on it

**math**

The weights of ice cream cartons produced by a manufacturer are normally distributed with a mean weight of 10 ounces and a standard deviation of 0.5 ounce.(a) What is the probability that a randomly selected carton has a weight greater than 10.21 ounces?(b) You randomly ...

**Math**

Last week Jason practice playing his bassoon for 95 minutes. this week he practiced five more minutes than three times the number of minutes he practiced last week. how many minutes did Jason practice this week?

**Math**

The population of Andhra Pradesh was 5.4 * 10^7 in 1988. If the population was growing at a constant rate of 2.4% per annum, what was the population in 2008 A.D ( Given that (1.024)^20 = 1.60694)

**Math**

I'm very stuck! I go to Connections Academy, and I'm on "Versatile Distributive Property Portfolio, Unit 5, Lesson 11. Please help! Here is the question: You are purchasing four items and want to calculate the tax. The items cost $2.50, $8.75, $3.00, and $10.25. The tax rate ...

**math**

1. .8(2.50+4.95+6.00) = .8(13.45) = 10.76 2. .8(2.5) + .8(4.95) + .8(6.00) = 2.00 + 3.96 + 4.8 = 10.76

**math**

can you please give me the answers to unit 4 lesson 11 test from CCA

**math**

A video streaming company offers two monthly plans. Plan A: $3 per video viewed, plus a flat rate of $8 per month Plan B: $5 per video viewed and no additional flat rate A. Write an inequality to determine when the cost of viewing n videos using Plan A is less than the cost of...

**math**

A woman spent 1/4 of her salary on rent. 1/3 of the remaining on food and 2/5 of the rest on transport. If she has 5000 naira left, what is her monthly salary?

**math**

list all the factors of the number 30

**math**

Your original purchase price was $950.00 plus 5% sales tax. You enter into an agreement where the interest (12.5% APR) is waived for the first 12 months provided you make the required monthly payments; otherwise the interest is accrued from the date of purchase. You missed the...

**math**

You purchase a computer for $875.00 plus 5% sales tax. You decide to finance it through the store's 0% program for 12 months. The terms state you pay nothing until the 12 months are over. When you receive the bill, you forget to pay it and are assessed a late fee of $39.00 ...

**Math**

Write an equation representing the relationship between the distance from school and time walking

**Math**

Juan has eight CDs that he is going to give away he lets his best friend choose two of the eight CDs how many different groups of cds are possible?

**Math**

Find a hypo tennis of the right triangle with legs of 9 centimeters and 12 centimeters 8 21*** 15 225

**math**

You want to buy three books that are on sale at 20% off. The original prices of the books are $2.50, $4.95, and $6.00. How much will you save? Calculation Without Distribution (Show all steps.) Please help!!! i know how to do it with distribution, but i am not sure how to do ...

**math**

car m takes 5hr to travel from point a to b.it would have taken 6 hr,if same car had travelled the same distance at a speed which was 15km/hr less than its original speed.what is distance between a and b ? (ans 450 km)

**Math 7 A**

Note: For questions 5 and 6, remember to show all of the steps that you use to solve the problem. Be sure to use the text box where the question mark (?) first appears to show your mathematical work. You can use the comments field to explain your work. Your teacher will review...

**math**

begging in the 1600s the tokuwaga shotgn who ruled japan, tried to maintain oredr and staibility bybegging in the 1600s the tokuwaga shotgn who ruled japan, tried to maintain oredr and staibility bybegging in the 1600s the tokuwaga shotgn who ruled japan, tried to maintain ...

**Math**

What number or numbers are equal to thrice their own square root?

**Math**

B. Com 3rd year business mathematics question

**Math/calculus HELPPP**

Graph the system of inequalities, and label each with a vertex with its coordinates. y-2x≥-3 y+3>−x 3y−2x≤12 2y+x<8 I did graph this but I'm having a hard time to label each vertex with its coordinates.

**Math**

Alonzo runs each lap in 6 minutes. He will run at most 72 minutes today. What are the possible numbers of laps he will run today?

**math**

A small grocery store offers two different brands of milk. Brand A 2% milk costs $3.50 a gallon. Brand B whole organic milk costs $3.00 for a half-gallon plus a one-time deposit of $1.50 for the glass jug. Once the glass jug deposit has been paid, the jug can be brought back ...

**math**

Hello i have a question.i tried it but i did not understand it. heres my question how can you describe the relative positions of p and q in the following situations? a,m(p.q)=0 b.m(p,q)<0 c.m(p,q)>0 d.m(p,q)does not exist

**Math**

4 letters are typed, with repetition allowed. What is the probability that all 4 will be vowels? Write your answer as a percent. Round to the nearest hundredth of a percent as needed.

**Math**

3 letters are typed, without repetition. What is the probability that all 3 will be vowels? Write your answer as a percent. Round your answer to three decimal places.

**Math**

4 letters are typed, without repetition. What is the probability that all 4 will be vowels? Write your answer as a percent. Round your answer to three decimal places.

**math**

A ship corved a distance of 41 km due north and them 23 km due east and again 15km towards north direction. How far is it from the point where it started?

**math**

Hello i have a question.i tried it but i did not understand it. heres my question how can you describe the relative positions of p and q in the following situations? a,m(p.q)=0 b.m(p,q)<0 c.m(p,q)>0 d.m(p,q)does not exist

**Math helppp**

As of January 2012, the top three grossing pictures worldwide were Avatar, Titanic and the finalenof Harry Potter series. Together they grossed $5.9 billion. Avatar earned just $300,000,000 less than both other movies combined, while Avatar and Titanic together were $600,000,...

**math!!**

Solve each problem 3. 2/3 = 1.2/x x = 18 <-- x = 1.8 x = 0.2 x = 10 4. 4/5 = 8/x + 2 x = 4 x = 9.5 x = 2 x = 8 <-- Create a proportion and solve. A recipe ideas 3 cups of flour to make 48 cookies. How much flour is needed to make 72 cookies? 3/48 = 72/x, x = 1,152 cups 3...

**math**

A girl starts to walk to her school, which is 20 miles away, at 6:50 and at a rate of 3 miles per hour. After a while, her dad picks her up and drives her through the remainder of the way at 30 miles per hour. If they arrived at school at 9:00, how far did she walk?

**math**

what will 2 boys weigh if 5 boys weigh 125kg?

**math**

Calculate the sum of the series: π²/3!-π^4/5!+π^6/7!-π^8/9!+π^10/11!....