If M is the theoretical maximum charge that a battery can hold and k is a positive constant that depends on the battery and the charger, the length of time (in minutes) required to charge the battery to a given level C is given by
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.
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If 
, how long will it take a battery to reach a 60% charge? Assume that the battery was fully discharged when it began charging.
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Please enter your answer as a number without the units, rounded to one decimal place.
Fill in the blank(s) with the appropriate word(s).
4.6
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Solve the system by the substitution method.y = x2 - 13x2 + y2 = 25
A. {(-3, -4), (3, -4)} B. {(-4, 3), (-3, -4), (3, -4), (4, 3)} C. {(9, 68), (16, 243)} D. {(-4, 3), (4, 3)}
Solve the problem.Regrind, Inc. regrinds used typewriter platens. The cost per platen is 
The cost to regrind 110 platens is 
Find the linear cost function to regrind platens. If reground platens sell for 
each, how many must be reground and sold to break even?
A. C(x) = 1.60x + 400 break-even = 41 B. C(x) = 1.60x + 224 break-even = 33 C. C(x) = 1.60x + 224 break-even = 230 D. C(x) = 1.60x + 400 break-even = 60
Write the following constraints as a system of equations using slack variables.
What will be an ideal response?
Perform the indicated operation. Simplify, if possible.
+ 
A. 
B. 
C. 
D. 