The picture shows the number of colored shirts sold this week at Joan’s Clothing Shop. Joan assumes this trend will continue. She is going to put in an order for 500 colored shirts. How many of these should she order in orange?

She should order 96 orange shirts  

Step-by-step explanation:

The picture is shown below.

From the picture below Joan sold 10 blue shirts, 3 gray shirts , 5 orange shirts and 8 green shirts out of the colored Shirts. The ratio of the colored shirt sold are 10 : 3 : 5 : 8 . The total shirt sold that week is 10 + 3 + 5 + 8 = 26 colored shirts.

If she assumes the trend is going to continue the number of orange she should order can be calculated below.

Let us find the ratio of orange shirt sold to the total colored shirt sold.

orange shirt sold / total colored shirt sold  = 5/26

This means every group of 26 colored shirts sold will have 5 orange shirt . So they told us she requested a total of 500 colored shirts . Following the same trend, how many group of 26 colored shirt are in 500.  

5/26 = x/ 500

cross multiply

2500 = 26x

divide both sides by 26

x = 2500/26

x = 96.15

x = 96 orange shirts

She should order 96 orange shirts  

First, let's check the amount of power consumed by each of the appliances for 10 hours. the calculated values are shown below.

dryer = (4000 watts per hour) (10 hours) = 4 watts or 40 kw
heater = (1500 watts per hour)(10 hours) = 15000 watts or 15 kw
radio = (40 watts per hour)(10 hours) = 400 watts or 0.40 kw

now, adding the total consumed by the three appliances for 10 hours, we have

total = 40 + 15 + 0.40 = 55.40 kw

since we now have the  total power consumed, and given that electricity costs 4.30 cents per kwh, we have

cost = 55.40(4.30) = 238.22 cents 

rounding off the cost to the nearest cents, we have a total amount of 238 cents for the total electricity cost.

answer: 238 cents