A company installs 5000 light bulbs, each with an average life of 500 hours, standard deviation of 100 hours, and distribution approximated by a normal curve. Find the approximate number of bulbs that can be expected to last the specified period of time.Between 500 hours and 675 hours
A. 2300
B. 4800
C. 2256
D. 4700
Answer: A
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The triangles are similar. Find the missing side, angle or value of the variable.?C .
m?A = 56°m?E = 27°
A. 97° B. 107° C. 56° D. 27°
Use a graphing calculator to graph the equation and identify the x-intercepts. If your answers are not exact, round to the nearest tenth.y = -2.5x2 + 8.9x - 1.5
A. x-intercept: (0, -1.5)
B. x-intercepts: (0.2, 0) and (3.4, 0)
C. x-intercepts: (-3.7, 0) and (0.2, 0)
D. x-intercept: (1.8, 6.4)
Perform the indicated operations and simplify the result. Leave the answer in factored form.
+ 
A. 6x + 1
B. 
C. 
D. 
Solve the problem.How much money needs to be invested now to get $2000 after 4 years at 8% compounded quarterly? Express your answer to the nearest dollar.
A. $2746 B. $1848 C. $584 D. $1457