Solve the problem.The amount of Jen's monthly phone bill is normally distributed with a mean of $72 and a standard deviation of $9. What percentage of her phone bills are between $72 and $81?
A. 47.5%
B. 34%
C. 68%
D. 95%
Answer: B
Mathematics
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Convert as indicated.128 ounces to pounds
A. 8 lb B. 32 lb C. 9 lb D. 12 lb
Mathematics
Solve the problem.The number of atoms in a slice of cheese is 12,505,448,638. Round this amount to the nearest hundred-million.
A. 12,505,000,000 atoms B. 12,505,449,000 atoms C. 12,510,000,000 atoms D. 12,500,000,000 atoms
Mathematics
Perform the indicated matrix operations.Let B = 
. Find -3B.
A. 
B. 
C. 
D. 
Mathematics
Divide the polynomial by the monomial.
A. 6x8 - 4x4 + x B. 6x7 - 4x4 + x2 C. 2 D. 6x7 - 4x3 + x
Mathematics