15
3 * 5 <== prime factorization
Answer:
xit the problem
Step-by-step explanation:
Answer:
He saves $0.0175 per mile
Step-by-step explanation:
Before the work done on the car´s engine, it took 0.033 gallons to travel one mile ( 5 gallons /150miles =0.033). After this work, the car spends 0.028 gallons to travel one mile (6 gallons/210 miles =0.028). The difference between this two is:
0.033 gallons/mile-0.028 gallons/mile= 0.005 gallons per mile.
Now Mr.Harper´s saves 0.005 gallons per mile.
In money he saves:
$3,50/gallon*0.005 gallon/mile= $0.0175/mile (the unit of "gallon" cancel each other)
Rounded to the nearest cent:
He saves $0.0 per mile.
Answer:
Two identical rubber balls are dropped from different heights. Ball 1 is dropped from a height of 181 feet, and ball 2 is dropped from a height of 238 feet. Write a function for the height of each ball.
h1(t) = -16t^2 + 181
h2(t) = -16t^2 + 238
When does ball 1 reach the ground? Round to the nearest hundredth. seconds
Solve: -16t^2+181 = 0
-16t^2 = -181
t^2 = 11.3125
t = 3.3634 seconds
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When does ball 2 reach the ground? Round to the nearest hundredth. seconds