Solve the problem.A new homeowner has a triangular-shaped back yard. Two of the three sides measure 65 ft and 80 ft and form an included angle of 125°. The owner wants to approximate the area of the yard, so that he can determine the amount of fertilizer and grass seed to be purchased. Find the area of the yard rounded to the nearest square foot.
A. 2130 sq. ft
B. 2129 sq. ft
C. 4260 sq. ft
D. 5200 sq. ft
Answer: A
Mathematics
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Use differentiation to determine whether the integral formula is correct.
dx = -4 cot 
+ C
A. No B. Yes
Mathematics
The magnitude of a star is a measure of its brightness, and it is related to the relative intensity of light reaching Earth from the star. The relationship is
Magnitude 
Relative intensity).
If relative intensity is divided by 100, how is magnitude affected?
?
A. Magnitude is decreased by 2. B. Magnitude is increased by 5. C. Magnitude is increased by 2. D. Magnitude is decreased by 5.
Mathematics
Perform the indicated operation and express in lowest terms.
- 
A. x + 5
B. 
C. 
D. 
Mathematics
Solve by elimination and check.5 x - y = 102x + y = 11
A. No solution B. (3, 6) C. (3, 5) D. (5, 3)
Mathematics