the solution for which of the following requires use of absolute value?a: At a school fundraiser, students washed twenty cars for 5$ per vehicle. Each driver donated and additional $3-$5. How much money was raised.b: A local merchant donates 10% of her sales on the first day of each month to a local cause. if her annual donations total $1500 what is her average daily sales?c: If gas cost $3.50 per gallon, how much did Celia pay to fill her tank with 8.2 gallons?d: Marissa ran a half marathon (about 13.1 miles) in 2 hours and 4 minutes. what was her speed?
Accepted Solution
A:
Part a) At a school fundraiser, students washed twenty cars for 5$ per vehicle. Each driver donated and additional $3-$5. How much money was raised.
we know that
raised money=total vehicle*[$5+absolute value($3-$5)] raised money=20*[$5+absolute value(-2)] raised money=20*[$7] raised money=$140 the answer Part a) is $140
Part b)A local merchant donates 10% of her sales on the first day of each month to a local cause. if her annual donations total $1500 what is her average daily sales?
step 1 divide $1500 by 12 1500/12=$125/month
if $125 is ------------> 10% x------------------> 100% x=100*125/10-----> x=$1250
the answer Part b) is $1250
Part c)If gas cost $3.50 per gallon, how much did Celia pay to fill her tank with 8.2 gallons?
multiply $3.50 by 8.2 gallons 3.5*8.2=$28.7
the answer Part c) is $28.7
Part d) Marissa ran a half marathon (about 13.1 miles) in 2 hours and 4 minutes. what was her speed?
we know that speed=distance /time distance=13.1 miles time=2 hours and 4 minutes----> 2+(4/60)---> 2.07 hour time=2 hours and 4 minutes----> 2*60+(4)---> 124 minutes speed=13.1/2.07----> 6.33 miles/hour speed=13.1/124----> 0.106 miles/minutes
the answer part d) is 6.33 miles/hour or 0.106 miles/minutes
The solution to problem a) requires the use of absolute value