Answer: 3 seconds
Step-by-step explanation: the pump fills 1 tire per second
So percent is parts out of 100 so x%=x/100
68/70
divide totaly
0.9714/1
multiply by 100/100 to make bottom 100
97.1% is the answer
That all dolphins have different sizes and are mostly different ages
Answer:
$225
Step-by-step explanation:
When Mary pays the cost in 12 equal payments, each is 1/12 of the total amount.
__
1/12 × $2700 = $225
Mary will have to pay $225 each month.
The original area of a face would be a^2. Now that you added b to the edge, the new area of each face would be (a+b)^2. To find how much the are increased, subtract a^2 from (a+b)^2. 
So the answer is b(2a+b)
