Answer:
13.5
Step-by-step explanation:
the shadow is 1.5 feet smaller than the object, 12+ 1.5 = 13.5
-3w - 2 < -17
add 2 on both sides
-3w - 2 < -17
+2 +2
-------------------
-3w < -15
divide by -3
(the inequality sign changes to the opposite side when you are dividing by negative number)
w > 5
9 Inches of wire can be bought for 54 cents. 96 cents divided by 16 inches is 6 cents. This means it costs 6 cents per inch of wire. 54 divided by 6 is equal to 9 inches of wire
Quartile Q 1 = 110. We have to find how many of electricians have score 110 or less.
For Q 1 : 25 % of the scores are below this value. The area under the bell-shaped curve of the normal distribution is 0.25. And since we have 288 electricians that took a certification test:
0.25 * 288 = 72.
Answer: 72 electricians had a score of 110 and less.