Solve the problem.A chemist needs 50 milliliters of a 67% solution but has only 61% and 76% solutions available. Find how many milliliters of each that should be mixed to get the desired solution.
A. 20 mL of 61%; 30 mL of 76%
B. 33 mL of 61%; 20 mL of 76%
C. 33 mL of 61%; 17 mL of 76%
D. 30 mL of 61%; 20 mL of 76%
Answer: D
You might also like to view...
Either the dimensions of two matrices or the matrices themselves are given. Find the dimensions of the product AB and the product BA. If either is not defined, say so.A = 
; B = 
.
A. AB is 3 × 3; BA is 3 × 3. B. AB is 1 × 1; BA is 3 × 3. C. AB is 1 × 1; BA is 1 × 1. D. AB is not defined; BA is not defined
Add as indicated.(5x2 + 5xy + y2) + (5x2 + 3xy - y2) + (x2 + xy - y2)
A. 11x2 + 9xy - y2 B. 10x2 + 8xy - y2 C. 9x2 + 7xy - y2 D. 11x2 + 9xy + y2
Point P is on the terminal side of ?. Evaluate the six trigonometric functions for ?. If the function is undefined, write "undefined."P(18, 24); find cos ?.
A. 
B. 
C. 
D. 
Solve the equation.
+ 2 = x - 2
A. {8}
B. {-4}
C. 
D. {2, 8}