A number is given in scientific notation. Write the number in decimal notation.There are 2.802 × 102 miles of highways, roads, and streets in a certain city.
A. 2802
B. 28.02
C. 280.2
D. 28,020
Answer: C
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Find all the second order partial derivatives of the given function.f(x, y) = xy2 + yex2 + 5
A. 
= yex2(1 + 2x2); 
= x; 
= 
= y + xex2
B. 
= 2yex2(1 + 2x2); 
= 2x; 
= 
= 2y + 2xex2
C. 
= 2yex2; 
= 2x; 
= 
= 2y + 2xex2
D. 
= 2yex2; 
= 2x; 
= 
= 2xex2
Solve the problem.Consider the following simplified digital photograph that has a 3 × 3 grid with four gray levels numbered from 0 to 3. It shows a letter Y in white on a black background.
Let A be the 3 × 3 matrix that represents this figure digitally. Find the matrix A.
A. 
B. 
C. 
D. 
A vertical plate is submerged in water (the surface of the water coincides with the x-axis). Find the force exerted by the water on the plate. (The weight density of water is 62.4 lb/ft3.)
Solve.2x + 5 = 3(x - 1)
A. -2 B. -8 C. 2 D. 8