Find the opposite of the number.-9
A. -9
B. 
C. 0
D. 9
Answer: D
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Simplify the rational expression below.
?
?
?
A. 
B. ?
C. ?
D. ?
E. ?
Solve the problem.The diagram below shows a rope connecting the top of a pole to the ground. The rope is 29 yd long and touches the ground 26 yd from the pole. How tall is the pole? Round approximations to the nearest tenth. 
26 yd
A. 82.5 yd B. 27.5 yd C. 6.4 yd D. 12.8 yd
Solve the problem.An electric company has the following rate schedule for electricity usage in single-family residences:Monthly service charge $4.93Per kilowatt service charge1st 300 kilowatts$0.11589/kWOver 300 kilowatts$0.13321/kWWhat is the charge for using 300 kilowatts in one month?What is the charge for using 375 kilowatts in one month?Construct a function that gives the monthly charge C for x kilowatts of electricity.
What will be an ideal response?
Solve the problem.The decay of 978 mg of an isotope is given by 
where t is time in years. Find the amount left after 
A. 144 B. 946 C. 140 D. 72