A garden store sells Kentucky bluegrass seed for $6 per pound and ryegrass seed for $3 per pound. How much rye must be mixed with 60 pounds of bluegrass to obtain a blend that will sell for $5 per pound?
A. 30 lb
B. 60 lb
C. 20 lb
D. 45 lb
E. 10 lb
Answer: A
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Solve the problem. Round to the nearest tenth unless indicated otherwise.The volume V of a given mass of gas varies directly as the temperature T and inversely as the pressure P. If V = 180.0 in3 when T = 300° and P = 20 lb/in2, what is the volume when T = 210° and P = 15 lb/in2?
A. 168.0 in3 B. 158.0 in3 C. 128.0 in3 D. 188.0 in3
Determine the domain and range of the relation.{(8, 7), (6, 4), (-7, 8), (10, 3), (-1, -2)}
A. Domain: {6, 7, -1, 4, 10}; Range: {8, 8, 3, -7, -2} B. Domain: {6, -1, 10, 8, -7}; Range: {7, 4, 8, 3, -2} C. Domain: {8, 8, 3, -7, -2}; Range: {6, 7, -1, 4, 10} D. Domain: {7, 4, 8, 3, -2}; Range: {6, -1, 10, 8, -7}
Solve the problem.The radius, r, of a sphere can be found using the formula 
where S is the surface area. If the surface area is 13,760 square inches, what is the radius? (Use 3.14 for ?, and round your answer to the nearest tenth of an inch.)
A. 66.2 in. B. 58.7 in. C. 33.1 in. D. 103.9 in.
Factor.36a2 - 36b2
A. (6a - b)(6a + b) B. 36(a - b)2 C. 36(a + b)(a - b) D. (a + 6b)(a - 6b)