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The correct answer is the third choice

Step-by-step explanation:

can be written as because when you're adding powers of an exponent together, that means exponents of that base are being multiplied together. For example, . can be written as since the powers of the exponents being multiplied are equal, so you can just multiply the bases together and take that to the shared power.

$450

step-by-step explanation:

first, you have to multiply 150x2=300

next, you have to add 150+300= 450

i think the answer is b.

step-by-step explanation:

not 100% sure though.