Show that the function is a solution of the wave equation.w(x, t) = e-9ct cos -9x
A. No
B. Yes
Answer: A
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Solve by using the addition property of equality.-28.3 - b = 19.0
A. {47.3} B. {9.3} C. {-47.3} D. {-9.3}
Use a calculator and the change-of-base formula to find the logarithm to four decimal places.log30 99.47
A. 3.3157 B. 0.7394 C. 1.9977 D. 1.3524
Solve the problem.On the December 6 billing date, Linda had a balance due of $596.99 on her credit card. The transactions during the following month were: 
The interest rate on the card is 1.2% per month. Using the average daily balance method, find the finance charge on January 6 (December has 31 days).
A. $12.90 B. $12.94 C. $12.71 D. $14.24
Solve.The relationship between 
and 
degrees of measuring temperature is linear. Find an equation relating 
and 
if 
corresponds to 
style="vertical-align: -4.0px;" /> and 
corresponds to 
Use the equation to find the Celsius measure of 
A. C = 
F - 
; 
°C
B. C = 
F - 10; 
°C
C. C = 
F - 80; - 
°C
D. C = 
F + 
; 
°C