In science experiments, the temperature of a substance is changed from 42 ºF to - 54ºF at an average rate of - 12 degrees per hour. Over how many hours does the change take place?

You invest 2000 in an account that is compounded continuously at an interest rate of 5. You never withdrawal money from the account. Which equation gives the amount of money you will have in the account after t years?

A proportional relationship can be represented by an equation in the form y = kx, where k is the constant of proportionality. For the equation 2x = 18y, what is the constant of proportionality?

Write 162 in expanded form. 162 = 0

How do you simplify 267/45

Sam bought a car for $25,000 in 2009. Since then the car has depreciated in value by $1,500 a year. Write a function that will allow you to calculate how much the car will be worth in 5 years if we let it 2009 be t=0

Evaluate the expression below when y = - 3. 2y + 7 -4y - 10 A. -1 22 B. -13 2 C. 1 2 D. 1

A science teacher ordered $660 worth of microscopes and dissection kits for the new science lab. A total of 22 microscopes and 44 dissection kits were ordered. A microscope costs three times as much as a dissection kit.

The square root of a 100 is it a whole number or natural number

How do u expand 500,000

How does the volume of a sphere with radius 2cm compare to the volume of a sphere with radius 1cm