Provide an appropriate response.To encourage conservation, a gas company charges two rates. You pay $0.53 per therm for 0-70 therms and $0.74 for each therm over 70. Write a compound fraction to represent the monthly cost of t therms of water.
What will be an ideal response?
which simplifies to 
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Solve.The function A = A0e-0.0077x models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault. If 900 pounds of the material are initially put into the vault, how many pounds will be left after 80 years?
A. 506 lb B. 486 lb C. 413 lb D. 400 lb
Explain the mistake in the translation. Then write the correct translation.Negative four times x minus two is the same as six times the difference of x and seven.Translation: -4x - 2 = 6(7 - x)
What will be an ideal response?
Solve the problem.A car traveled 249 miles on 9
gallons of gas. How many miles per gallon did it get?
A. 27 mpg
B. 27
mpg
C. 27
D. 28 mpg
Use the fundamental identities to simplify the expression.cos ? - cos ? sin2?
A. cos3? B. sin ? C. tan2? D. sec2?