Solve the problem.A chemist needs 180 milliliters of a 78% solution but has only 54% and 90% solutions available. Find how many milliliters of each that should be mixed to get the desired solution.
A. 70 mL of 54%; 110 mL of 90%
B. 110 mL of 54%; 70 mL of 90%
C. 120 mL of 54%; 60 mL of 90%
D. 60 mL of 54%; 120 mL of 90%
Answer: D
Mathematics
You might also like to view...
Solve the problem.Find the derivative of the function 
at the point 
in the direction in which the function increases most rapidly.
A. 
B. 
C. 
D. 
Mathematics
Solve.
The monthly payments on a $196,000 loan at 7% interest for 25 years is $1,385.72. How much of the first monthly payment will go toward the principal?
A. $242.39 B. $97.00 C. $1,288.72 D. $1,143.33
Mathematics
Write the complex number in rectangular form.
cis 270°
A. -i
B. -i
C. -
D. -2i
Mathematics
Divide and simplify.
÷ 
A. 
B. 
C. 
D. 
Mathematics