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
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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
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
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
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