Can you help me with my Math, please?
2 answers:
Answer:
Option C is the correct answer.
Step-by-step explanation:
The original painting dimensions are = 92 cm long by 73 cm high
The first poster measures 120 cm long by 100 cm high.
Lets check the ratio.
by
This reduces to nowhere.
The second poster measures 138 cm long by 109.5 cm high.
Ratio is : by
This reduces to 1.5 by 1.5
Therefore we can say - The first poster is not an accurate representation of the painting, but the second poster is an accurate representation.
The ratio defines it all. The ratio of the first poster to original picture is not accurate but the ratio of second one is accurate.
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The question is incomplete.Here is the complete question.
The load that can be supported by a rectangular beam varies jointly as the width of the beam and the square of its length, and inversely as the length of the beam. A beam 13 feet long, with a width of 6 inches and a height of 4 inches can support a maximum load of 800 pounds. If a similar board has a width of 8 inches and a height of 7 inches, how long must it be to support 1300 pounds?
Answer: It must be 392 inches or approximately 33 feet.
Step-by-step explanation: According to the question, the measures (width, length and height) of a beam and the weight it supports are in a relation of <u>proportionality</u>, i.e., if divided, the result is a constant.
For the first load:
width = 6in
height = 4in
length = 13ft or 156in
weight = 800lbs
Then, constant will be:
k = 1300
For the similar beam:
L = 49.8
L = 392in or 32.8ft
A similar board will support 1300lbs if it has 392 inches or 32.8 feet long.