Answer:
5/3
Step-by-step explanation:
z = (Distributed score - Mean)/Standard deviation= (80-70)/6 = 5/3
<h2>
If all interior angles are 162, polygon has 20 sides.</h2>
Explanation:
Questioner has mentioned that a polygon has interior angles of 162 It is assumed from this that all interior angles are 162.
As interior angles are 162, each exterior angle is 180−162=18.
Sum of all the exterior angles of a polygon is always 360 and as each exterior angle is 18,
Number of angles / sides of polygon are 360 / 18 = 20
Step-by-step explanation:
volume = [(15×11)+(½×15×8)] x 12
= (165+60) x 12
= 225×12
= 2,700 cm³
Answer:
B & D
Step-by-step explanation:
We use percents in decimal form to multiply it with the price. We convert percents into decimals by dividing the percent number by 100. For example, 78% divided by 100 becomes 0.78.
There are two ways to look at it:
- For finding the price we pay during a sale, we focus on the percent we pay. If 22% off is the sale, then we spend 78% or 100-22=78. If 20% off is the sale, then we pay 80% or 0.80. Multiply that by x an unknown price and we have 0.8x.
- We can find the percent off by multiplying the price by the percent conversion. So 20% is 0.20. Then subtract it from the original price to find the leftover that we pay. This is x-0.2x.