Solve the problem.In a chemistry class, 4 liters of a 4% silver iodide solution must be mixed with a 10% solution to get a 6% solution. How many liters of the 10% solution are needed?
A. 2.0 L
B. 1.0 L
C. 4.0 L
D. 3.0 L
Answer: A
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Find the indicated partial sum for the given sequence.s6, 2, 3, 4, 5, . . .
A. 2 B. 12 C. 8 D. 27
Find average for each set of numbers.170, 129, 151, 158, 167
A. 155 B. 158 C. 165 D. 154
Find the circumference or area of the circle, as requested. Give an exact answer (in terms of ?) and an approximation using 3.14 for ?. If necessary, round to two decimal places.Find the area.
A. 2.25? m2; 7.07 m2 B. ? m2; 18.84 m2 C. 3? m2; 42.39 m2 D. 9? m2; 14.13 m2
Solve the problem.Linda invests $25,000 for one year. Part is invested at 5%, another part at 6%, and the rest at 8%. The total income from all 3 investments is $1600. The income from the 5% and 6% investments is the same as the income from the 8% investment. Find the amount invested at each rate.
A. $8000 at 5%, $10,000 at 6%, $7000 at 8% B. $10,000 at 5%, $5000 at 6%, $10,000 at 8% C. $10,000 at 5%, $10,000 at 6%, $5000 at 8% D. $5000 at 5%, $10,000 at 6%, $10,000 at 8%