How many three-digit numbers can be formed under the following condition?
?
The leading digit cannot be zero.
?

A. 800
B. ?500
C. ?900
D. ?600
E. ?700


Answer: C

Mathematics

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Find the extreme values of the function subject to the given constraint.  

A. Maximum: 36 at    minimum: -36 at  
B. Maximum: 26 at    minimum: 0 at  
C. Maximum: 36 at    minimum: 0 at  
D. Maximum: 26 at    minimum: -26 at  

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Evaluate the expression without using a calculator.-(-42)

A. -16 B. -8 C. 8 D. 16

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Solve the formula for the specified letter.S =  for  t2

A. t2 = 
B. t2 = 
C. t2 = 
D. t2 = 

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For the restaurant bill, estimate the tip. Then find the exact amount of the tip. State your answers to the nearest hundredth.The restaurant bill is $28.79. Give the estimate of a 20% tip and the exact amount of a 20% tip.

A.

Estimate: $7.50Exact: $7.20

B.
Estimate: $3.00Exact: $2.88

C.
Estimate: $4.50Exact: $4.32

D.
Estimate: $6.00Exact: $5.76

Mathematics