Determine whether the function is a solution of the wave equation.w(x, t) = e-6ct cos -6x
A. No
B. Yes
Answer: A
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Find the area.
A. Not enough data B. 186.2 cm2 C. 161.1 cm2 D. 185.1 cm2
Factor the four-term polynomial by grouping.4x + 40 + xy + 10y
A. (x + 10y)(4 + y) B. (x + 10)(4 + y) C. (y + 10)(x + 4) D. (y + 10)(4x + y)
Solve the problem.Glenn and Paula want to dig an irrigation channel for their garden. Together it takes them 
to dig an appropriately sized irrigation channel. If Paula can dig the channel by herself in 
how long would it take Glenn to dig the channel by himself? Round to the nearest tenth, if necessary.
A. 1.7 hr B. 4.3 hr C. 1.3 hr D. 3.2 hr
Decide if the answer is reasonable or unreasonable by using front end to estimate the answer. If the exact answer is not reasonable, find the correct answer.2186.8 ÷ 19.7 = 11.1
A. Unreasonable, should be 1.11 B. Unreasonable, should be 111 C. Reasonable D. Unreasonable, should be 1110