Express the sum in sigma notation.
+ 
+ 
+ 
A. 
B. 
C. 
D. 
Answer: A
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Write the number in decimal notation. One bushel equals approximately 3.524 × 101 liters.
A. 35.24 B. 3524 C. 352.4 D. -35.24 E. 3.524
Find the unit vector that has the same direction as the vector v.v = 12i + 5j
A. u = 156i + 65j
B. u = 
i + 
j
C. u = 
i + 
j
D. u = - 
i - 
j
Solve the problem.A grasshopper is perched on a reed 5 inches above the ground. It hops off the reed and lands on the ground about 7.9 inches away. During its hop, its height is given by the equation 
, where x is the distance in inches from the base of the reed, and h is in inches. How far was the grasshopper from the base of the reed when it was 3.25 inches above the ground? Round to the nearest tenth.
A. 0.9 in. B. 7.9 in. C. 6.7 in. D. 1.3 in.
Subtract.49 - 2.15
A. 48.785 B. 46.85 C. 46.985 D. 2.75