Answer: a) 8%
b) 34%
c) 12%
<u>Step-by-step explanation:</u>

The thousand if this number is 533,736.
So we need to round by that place.
The answer is 534,000 because since the 7 is greater than 5, we need to round up.
Andrew must get a 74 for his average to be at 70 percent. you can plug and chug in your calculator or use an equation like this one (64+69+73+x)/4=70 ; solve for x and your number should be 74