Answer:
12
Step-by-step explanation:
15×0.8= 12
you're multiplying the total number of questions with the score as a decimal
Answer:
40.2
Step-by-step explanation:
law of cosines
x^2=40^2+28^2-2*28*40*cos(70)
put in calculator and square root the answer
40.222.... is approximately 40.2
Answer:

Step-by-step explanation:
The original board is 40 1/8 inch and it is cut in 3 pieces of equal length:
New boards = 
And now he cuts again 3 3/4 inches off of each one of the new boards (substracts)
