Solve the problem.At the end of the day, a storekeeper had $1070 in the cash register, including both the sale of goods and the sales tax of 7%. What amount of sales tax had been collected?
A. $75
B. $70
C. $65
D. $60
Answer: B
Mathematics
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Find the product and simplify.
? y10
A. 
B. 
C. 
D. 
Mathematics
Transform the equation by rotating the axes through the given angle. Identify the curve.31x2 + 10
xy + 21y2 - 144 = 0, ? = 30°
A. 
+ 
= 1; ellipse
B. 
+ 
= 1; ellipse
C. y'2 = -4
x'; parabola
D. x'2 = -4
y'; parabola
Mathematics
Add. Write the answer in lowest terms as a mixed number.
A. 13
B. 12
C. 11
D. 12
Mathematics
Use a calculator to find the function value to four decimal places.cos (38.8°)
A. 0.6266 B. 0.8040 C. 0.4528 D. 0.7793
Mathematics