Estimate. Choose a rounding digit that gives one or two nonzero digits.23 × 54
A. 1000
B. 2000
C. 10
D. 100
Answer: A
You might also like to view...
Solve the problem.A domed ceiling is a parabolic surface. For the best lighting on the floor, a light source is to be placed at the focus of the surface. If 9 m down from the top of the dome the ceiling is 19 m wide, find the best location for the light source. Round to one decimal place if necessary.
A. 5 m down from the top B. 2.5 m down from the top C. 10 m down from the top D. 7.5 m down from the top
Find the probability.When a single card is drawn from an ordinary 52-card deck, find the probability of getting the 7 of diamonds.
A. 
B. 
C. 
D. 
Simplify.(
+ 
)2
A. 81a2 + 2
+ b2
B. 9a + 2
+ b
C. 9a + 
+ b
D. 81a2 + 
+ b2
Solve the problem.On August 10, the Fernandez family received 31 pieces of mail, consisting of magazines, bills, letters, and ads. If they received the same number of magazines as letters, three more bills than letters, and five more ads than bills, how many magazines did they receive?
A. 6 magazines B. 5 magazines C. 13 magazines D. 8 magazines