Solve problems using a calculator.A machine shop has eleven lathes each weighing 2390 pounds, four milling machines each weighing 2430 pounds, and seven drill presses each weighing 387 pounds. What is the total weight of these machines?
A. 38,719 pounds
B. 38,698 pounds
C. 38,711 pounds
D. 38,763 pounds
Answer: A
Mathematics
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Evaluate the integral.
A. 
?
B. 
?
C. 
D. 
?
Mathematics
A school board has determined that there should be 3 teachers for every 50 students. How many teachers are needed for an enrollment of 2,650 students?
A. 134 teachers B. 148 teachers C. 159 teachers D. 143 teachers E. 216 teachers
Mathematics
Write the conjugate 
of the complex number z. Then find z
.z = 1 - 9i
A. 
= 1 + 9i, z
= 82
B. 
= 1 + 9i, z
= -80
C. 
= 1 + 9i, z
= 1 - 81i
D. 
= 1 + 9i, z
= 1 - 81i2
Mathematics
For the given rectangular equation, write an equivalent polar equation.y = x
A. sin ? = - cos ? B. r = sin ? C. r = cos ? D. sin ? = cos ?
Mathematics