When a stone is dropped into a deep well, the number of seconds until the sound of a splash is heard is given by the formula  figure 1.png)
, where x is the depth of the well in feet. For one particular well, the splash is heard 10 seconds after the stone is released. How deep (to the nearest foot) is the well?
A) 700 ft B) 900 ft C) 1,167 ft D) 2,000 ft
C) 1,167 ft
Mathematics
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Divide the expression. You may want to use the property 
= 
+ 
. Do not use a calculator.
A. 3x8 - 9x4 B. 3x8 + 45x7 C. -6x15 D. -15x11 - 9x4
Mathematics
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.sin ? = - 
, 
< ? < 2?Find cos 
.
A. - 
B. 
C. - 
D. 
Mathematics
For the polynomial function, find the requested value.f(x) = 4x5 - 6x4 - 2x3 - x2; f(2)
A. 41 B. 7 C. 8 D. 12
Mathematics
Find the probability. Round to the nearest ten-thousandth when necessary.A family has five children. The probability of having a girl is 1/2. What is the probability of having exactly 2 girls and 3 boys?
A. 0.6252 B. 0.0312 C. 0.3125 D. 0.0625
Mathematics