last month, karmin made $480 working for 30 hours. this month, she will get a 15% increase in the amount she…

last month, karmin made $480 working for 30 hours. this month, she will get a 15% increase in the amount she earns per hour. what will be her hourly rate, in dollars per hour, after the raise? $480 $2.40 $18.40 $15.00

last month, karmin made $480 working for 30 hours. this month, she will get a 15% increase in the amount she earns per hour. what will be her hourly rate, in dollars per hour, after the raise? $480 $2.40 $18.40 $15.00

Answer

Explanation:

Step1: Calculate last - month's hourly rate

Last - month's earnings were $480 for 30 hours. So the last - month's hourly rate $r_1=\frac{480}{30}=16$ dollars per hour.

Step2: Calculate this - month's hourly rate

This month, there is a 15% increase in the hourly rate. The new hourly rate $r_2=r_1(1 + 0.15)$. Substitute $r_1 = 16$ into the formula: $r_2=16\times(1 + 0.15)=16\times1.15 = 18.4$ dollars per hour.

Answer:

$18.40$