Solve the problem.Sandy manages a ceramics shop and uses a  kiln to fire ceramic greenware. After turning off her kiln, she must wait until its temperature gauge reaches  before opening it and removing the ceramic pieces. If room temperature is  and the gauge reads  in 10 minutes, how long must she wait before opening the kiln? Assume the kiln

cools according to Newton's Law of Cooling:   U = T + (Uo - T)ekt.(Round your answer to the nearest whole minute.)

A. -236 minutes
B. 77 minutes
C. 166 minutes
D. -356 minutes


Answer: C

Mathematics

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Solve the problem.An object is thrown upward from the top of a  building with an initial velocity of 48 feet per second. The height h of the object after t seconds is given by the quadratic equation   When will the object hit the ground?

A. 5 sec B. 160 sec C. -2 sec D. 2 sec

Mathematics

Translate the phrase to an algebraic expression. Use "x" to represent "a number". The sum of -3  and a number

A. -3 ? x
B. x - 3
C. -3 + x
D. 3 - x

Mathematics

Factor the perfect square trinomial completely.16m2 - 72m + 81

A. (4m - 10)2 B. (4m + 9)(4m - 9) C. (4m + 9)2 D. (4m - 9)2

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Factor the perfect square trinomial completely.147m2 + 168mn + 48n2

A. 3(7m - 4n)2 B. (21m + 12n)2 C. 3(7m + 4n)2 D. (21m - 3n)2

Mathematics