Provide an appropriate response.Perform the indicated operations: 489 × 104 =
A. 48,000,000
B. 195,000
C. 4,890,000
D. 0.0489
Answer: C
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Find the surface area of the solid.The right triangular prism shown has a height of 12 cm and its base is an equilateral triangle with sides of length 8 cm. Find its surface area. Give an exact answer. 
A. 288 + 32
cm2
B. 384 + 16
cm2
C. 384 + 32
cm2
D. 288 + 16
cm2
Find the length of the arc on a circle of radius r intercepted by a central angle ?. Round answer to two decimal places.r = 4 centimeters, ? = 55°
A. 3.46 centimeters B. 4.22 centimeters C. 3.84 centimeters D. 3.07 centimeters
Divide, if possible. If a quotient is undefined, state so.45 ÷ (-45)
A. 
B. 0
C. -1
D. 1
Find the area of the triangle. Approximate values to the nearest tenth when appropriate.
A. 70 ft2 B. 50 ft2 C. 140 ft2 D. 35 ft2