Determine the x- and y-intercepts on the graph of the equation.y = 7x + 1
A. x-intercept is - 7; y-intercept is 7
B. x-intercept is - 
; y-intercept is 1
C. x-intercept is 
; y-intercept is 1
D. x-intercept is 1; y-intercept is 
Answer: B
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For the smooth curve r(t), find the parametric equations for the line that is tangent to r at the given parameter value 
r(t) = (4t2 - 7t)i + (t + 6)j + k ; t0 = 2
A. x = 9t, y = t, z = t B. x = 2 + t, y = t, z = t C. x = 2 + 9t, y = 8 + t, z = 1 D. x = 2 + 9t, y = 8 + t, z = 0
Find the center of mass of a thin plate of constant density covering the given region.The region bounded by the x-axis and the curve y = 5sin x, 0 ? x ? ?
A. 
= 
, 
= 
B. 
= ?, 
= 
C. 
= 
, 
= 
D. 
= 
, 
= 
Find all real numbers in the interval [0, 2?) that satisfy the equation.sin2 x + sin x = 0
A. 
B. 
C. 
D. 
Solve the problem.The percent p of high school students who participate in sports at a public high school can be modeled by 10p - 16x = 224,where x is the number of years after 2010. Interpret the slope as a rate of change if x is the independent variable.
A. The percent of high school students who participate in sports at this school is decreasing by 1.6 percent per year. B. The percent of high school students who participate in sports at this school is increasing by 16 percent per year. C. The percent of high school students who participate in sports at this school is decreasing by 16 percent per year. D. The percent of high school students who participate in sports at this school is increasing by 1.6 percent per year.