Answer:
base: 2/3 ft (Answer C)
Step-by-step explanation:
Recall that the formula for the area of a triangle of base b and height h is
A = (1/2)(b)(h).
Here A = 2/5 ft^2 = (1/2)(b)(6/5 ft)
We must solve this for b. Start by multiplying all terms by 10 to eliminate the fractions:
10(2/5 ft^2) = (6 ft)(b), or
4 ft^2 = (6 ft)b, or
4 ft^2
b = ---------------- = 2/3 ft (Answer C)
6 ft
In this equation there are few key numbers, thankfully XD, so it does not take too long to figure out that the 0.04 is clearly a tax on the repairs as 30h is representing the hours spent repairing Kimber's phone.
Answer: Choice D. 
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Work Shown:
We multiply the coefficients 9.2 and 7 to get 64.4, which is the same as 6.44*10^1 in scientific notation. When multiplying exponential expressions with the same base, we add the exponents
This is what the steps could look like
The final result is in scientific notation as the coefficient c is restricted such that 
Longer than the triangles , but shorter triangles, are bigger than eachother but same same and no different shape .
C is the correct answer
Hope it helps!
