Estimate. Choose a rounding digit that gives one or two nonzero digits.4.5 × 2.63
A. 8
B. 1.5
C. 0.8
D. 15
Answer: D
Mathematics
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Find the indicated relative minimum or maximum.Minimum of f(x,y) = x2 + y2,subject to x + y = 1
A. f(0, 1) = 1
B. f 
= 1
C. f 
= 
D. f(0, 1) = 
Mathematics
Show that the equation is not an identity by finding a value of x for which both sides are defined but are not equal.
Mathematics
Solve the problem.Anne and Nancy use a metal alloy that is 17% copper to make jewelry. How many ounces of an alloy that is 11% copper must be mixed with an alloy that is 22% copper to form 55 ounces of the desired alloy?
A. 27 ounces B. 30 ounces C. 25 ounces D. 35 ounces
Mathematics
Divide and simplify. Assume that all expressions under radicals represent positive numbers.
A. 24
B. 20
C. 4
D. 4
Mathematics