Find the length of the curve with the given vector equation.r(t) = 4ti + 
j + 
k; -9? t ? 6
A. -75
B. 75
C. 375
D. -15
Answer: B
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Graph the scalar product of the complex number shown in the graph and the given number.2
a = -1 + 3j
A. 
b = 2(-1 + 3j)
B. 
b = 2(-1 + 3j)
C. 
b = 2(-1 + 3j)
D. 
b = 2(-1 + 3j)
Solve the problem.When going more than 38 miles per hour, the gas mileage of a certain car fits the model 
where x is the speed of the car in miles per hour and y is the miles per gallon of gasoline. Based on this model, at what speed will the car average 15 miles per gallon? (Round to nearest whole number.)
A. 149 B. 48 C. 73 D. 98
Provide an appropriate response.Which of the four methods of solving quadratic equations work for any quadratic equation?
What will be an ideal response?
Write the number in decimal form.
Fill in the blank(s) with the appropriate word(s).