Answer:
b.$7,172.16 favorable
Explanation:
std rate $ 13.13
actual rate $ 12.20
actual hours 7,712
difference between actual and standart rate $0.93
As it is positive the variance is favorable as we spend less per hour than standard.
Now, we multiply by the actual hours to get the rate variance:
7,712 hours x $0.93 = $7,172.16
Answer:
- <u><em>option C. 1331.</em></u>
Explanation:
The question asks for an estimate of 11.4³.
To calculate 11.4³ exactly to must multiply 11.4 × 11.4 × 11.4.
But to have an estimate, the easiest way is to round 11.4 to 11 and find 11³ = 11 × 11 × 11.
That is not a difficult operation.
That is equal to 11² × 11.
- 11² is a common square, which you should know that it is 121. Else, you can multiply 11 × 11 easily and obtain 121:
11 × 11 = (10 + 1) × 11 = 110 + 11 = 121
11 × 121 = (10 + 1) × 121 = 10 × 121 + 121 = 1210 + 121 = 1331
There you have your answer: option C. 1331.