David W.

The number of cells in a culture after x hours is given by the functiony(x) = 7e2xCreate the inverse function that predicts the number of hours we must wait until a givennumber of cells are in that... more

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How Much More

05/30/17

how much more

A baseball team has home games on Thursday and Sunday. The two games together earn $3781.50 for the team. Thursday's game generates $37.50 less than Sunday's game. How much money was taken in at... more

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Algebra 1

05/28/17

E=mc2; M=3; C=6 Solve for e.

I don't understand anything about Algebra and it is hard for me because I have been out of school for about 34 years. This is like starting over again.

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College Algebra Word Problem

05/28/17

see description for full

Larry MItchell invested part of his 14000$ advance at 5% annual simple interest and the rest at 2% annual interest. If his total yearly interest from both accounts was $610, find the amount... more

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Exponents And Powers Equations

05/26/17

2x^4+ 6x^6 +9x^8/ 2x^3

Simplify 2x^4+ 6x^6 +9x^8/ 2x^3

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Math Word Problem

05/25/17

if 1000 years = 1 day then how many mins. does 2 years =

1 day on planet X is equal to 1000 earth years, so how long would 2 earth years equal on planet X ?

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Other

05/25/17

The dress store is having a sale where all merchandise is 1/4 off. A woman buys $48 of merchandise at the sale price. What would she have had to

WHAT WOULD she have had to pay at the regular price?

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Math Help

05/25/17

There are 45 questions on a test. The best student got 39 questions correct. What was the students percent error? Round to the nearest tenth of a percent

i need help because i dont know what im doin

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Other

05/25/17

The area of a train ticket is 50 square centimeters. The perimeter is 30 centimeters. What are the dimensions of the ticket

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Math

05/24/17

On a math test you obtained a score of 72 points. That was 80% of the total number of points on the test. How many total points were on the test

How do you find the answer and how on earth do you do it? how do find the 80% worth of questions

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Math Help

05/24/17

what is 46 2/3% of 28

I had showed my work and got the answer 1306.66667 but then got the fraction answer 1306 2/3 need help he took off 2 points for the answer I gave him.

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Word Problem Help

05/24/17

A family of 6 has food for 30 days. How long will the food last, if they add 3 new family members?

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Math

05/23/17

Write a polynomial equation of degree 4 that has the following roots: -1 repeated three times and 4

Whats a polynomial equation of degree 4 that has the following roots: -1 repeated three times and 4

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Trigonometry Graphing Graphing Functions

05/22/17

Where does a cosine graph with an "a" value =/= 1 start?

The function for a cosine graph is f(x)=a cos b (x-c) + d, and in the parent function of f(x)=cos x, the "a" value = 1. I was taught that in a cosine function the graph "starts" at (0, 1). Is this... more

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Equation Of A Parabola From Focus And Directrix

05/21/17

Write the equation for a parabola with a focus at (1,-4) and a directrix at x = 2. x=

don't know how to get the equation since it gives me x=

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Precalculus Homework Interest Applying The Concepts

05/21/17

Ms. Jordon invested $4900, part at 6% interest and rest at 8%. If the yearly interest on each investment is the same, how much interest does she receive at year

Applying the Concepts

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Building Construction

05/21/17

I need to quote how much it is to fence a yard.

The perimeter of the yard is 927.80m. A 3m panel costs $58. Fence posts are $12.50 each and are required to join two panels together. A path gate is required which costs $140 and are 1.2m wide... more

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Fractions Help

05/21/17

Fraction problem

A bag of flour weighed 2.8 kg. Amy used some flour to bake cupcakes and cookies. The amount of flour used to bake cookies was 4 times the amount of flour used to bake cupcakes. She was left with... more

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Westville has a population of 7200, which is decreasing at a rate of 80 people per year. Troy has a population of 5000 and is gaining 120 people per year. How m

Twice a number is decreased by 9, and the sum is multiplied by 4. The result is 8 less than 10 times the number. What is the number?

A hotel manager found that his gross receipts for the day, including a 3% sales tax , were $3554.53. Find the amount of sales tax collected