Question

note: please make sure to properly format your answers. all dollar figures in the answers need to include the dollar sign and any amount over 1,000 should include the comma ($2,354.67). all percentage values in the answers need to include a percentage sign (%). for all items without specific rounding instructions, round your answers to two decimal places, show both decimal places (5.06). the zwerling family installed central air - conditioning in their house this summer. they are comparing the electric bills of this summer and last summer. see the data in the table. month this summer last summer june $311.20 $179.90 july $300.65 $203.40 august $302.50 $201.11 a. what was the total electric bill this summer? b. what was the total electric bill last summer? c. did the bill increase more or less than 50%?

Explanation:

Step1: Calculate this summer's total

Add June, July and August bills of this summer.
$311.20 + 300.65+302.50=\$914.35$

Step2: Calculate last summer's total

Add June, July and August bills of last summer.
$179.90 + 203.40+201.11=\$584.41$

Step3: Calculate the percentage increase

First find the increase amount: $914.35 - 584.41=\$329.94$. Then calculate the percentage increase: $\frac{329.94}{584.41}\times100\%\approx 56.46\%$

Answer:

a. $\$914.35$
b. $\$584.41$
c. More than 50%