Convert to Celsius. Use the formula C = 
(F - 32) or C = 
. Round your answer to the nearest tenth if necessary.21°F
A. 69.8°C
B. 20.3°C
C. -6.1°C
D. 5.8°C
Answer: C
Mathematics
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Find the average value of the function f over the given region.f(x, y) = 4x + 8y over the triangle with vertices 
, 
, and 
A. 
B. 12
C. 
D. 
Mathematics
Find the indicated function value for the function.f(x) = {
f(7)
A. 49 B. 31 C. 9 D. -14
Mathematics
Solve. Round to the nearest tenth when necessary.Hillary is standing outside of the shopping mall. She is 5.2 feet tall and her shadow measures 
long. The outside of the department store casts a shadow of 75 feet. How tall is the store?
A. 2886 ft B. 106.7 ft C. 0.5 ft D. 52.7 ft
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Use the square root property to solve the quadratic equation.10x2 = 9
A. ± 
B. ± 
C. ± 
D. 
Mathematics