$3000 x .04 =$120
$120 x 10 =$1200
$3000+1200= $4200 Total
I will just write the answers in order of the boxes from left-to-right and then up-to-down, so here I go...
ANSWER:
1. - 5
2. Is constant
3. Slope
Hope this was helpful! :)
This should be simple, add the Amounts of snow for the first week
4.32 + 6.86 = 11.18
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The subtract the amounts of snow from each week
11.18 - 7.89 = 3.29
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C.) 3.29 is your answer
From the setup of the problem, the "length of the top of the bookcase, measured along the attic ceiling" will be the hypotenuse of a right triangle, the length "AB". We have both the angle between AB and AC and the length of AC (3.24 meters), so we can use trigonometric identities.
The cosine of the 40 degree angle between AB and AC is equivalent to the length of AC divided by the length of AB. Equivalently, we have:

where "h", the hypotenuse, is the length we want. Rearranging the formula to solve for h we have that

which is 4.2295... meters. Converting to centimeters (multiplying by 100) we have that h = 422.95... centimeters, or if we round the value, h = 423 centimeters.
The answer is 81/8
Alternative Forms:
10 1/8 or 10.125