Perform the indicated operation and write the answer

Perform the indicated operation and write the answer in scientific notation.
(1.2 ×106)(3.8 ×107)
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3
a. 4.56 × 10013
b. 4.56 × 1013
c. 4.56 ×1042
d. 5 × 1013
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The correct answer is: 4.56 × 1013
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Question 7
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Simplify the expression. Write your answer with positive exponents only.
(t3z)2(3t-2z4)-2
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Question 8
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Solve the problem.
The lateral surface area A of a right circular cone is given by A = πrr2+h2−−−−−−√r2+h2 , where r and h
are the radius and height of the cone. Determine the exact value (in terms of π) of the lateral surface
area of a cone with radius 3 m and height 5 m. Then give a decimal approximation to the nearest square
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meter.
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Question 9
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Convert the expression to radical form and simplify.
91/2
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Question 10
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Convert the expression to radical notation.
x1/7
Select one:
a. 7x−−√7x
b. 1x7√1x7
c. x−−√7x7
d. x√7x7
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The correct answer is: x−−√7x7
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Question 11
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Multiply the radical expressions and simplify your answer.
(y+6−−−−√−7)2(y+6−7)2
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Question 12
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Multiply the radical expressions and simplify your answer.