Question

A) Solve the following equation for x.  Write answer with one decimal place.

77.4 / X = 18.8 / 51.4

B) If your car gets 40.9 mi/gal, how many gallons of gasoline would you use if you drove 638.5 miles? 1 mile = 5280 ft (exactly)  Include one decimal place in your answer.

C) Using your calculator, answer each problem below. Be sure to use the proper number of significant figures.

   (2.0e3)(3.42e-2)=
   3.456/1.3e3=
   0.1765/(10.32 - 9.45)=

D)

A person's heartbeat is 67 beats per minute. If his/her heart beats 3.1e9 times in a lifetime, how long (in whole years) does the person live? Disregard leap years.  

Answer 1

The above questions can be answered as follows :