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professor190 [17]
4 years ago
11

NEED HELP ASAP!!! These math problem like this are not my strongest when dealing with math. Three boxes are stacked one on top o

f the other. One box is 5 feet 4 inches tall, one is 2 feet 7 inches tall, and one is 3 feet 10 inches tall. How high is the stack? Write your answer in feet and inches. Use a number less than 12 for inches.
Mathematics
1 answer:
Norma-Jean [14]4 years ago
6 0
5' 4" = 64"  (5x12)+4
2' 7" = 31"  (2x12)+7
3' 10" = 46"  (3x12)+10

64+31+46= 141"
141/12= 11.75= 11 3/4
12" per foot / 4 denominator from above= 3
3 numerator from above x 3 quotient from above= 9
11' 9"
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Element X is a radioactive isotope such that every 5 years, its mass decreases by half.
Verdich [7]

Answer: 24 grams of element would remain.

Step-by-step explanation:

Exponential function for decay:

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As per given,

A = 569 grams , b=\dfrac12

n= 5 years, t = 23 years

Put all values in (i) , we get

f(23)=590(\dfrac12)^{\frac{23}{5}}\\\\\\=590\times 0.0412346222117\\\\=24.3284271049\approx 24

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3 years ago
Divide £30 between 2 people in the ratio 1:2
yuradex [85]
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3 0
4 years ago
Read 2 more answers
I need this last answer please help
pychu [463]
I'm not 100% on this, but something like 90%
SSS stands for Side, Side, Side. This means if you have 2 triangles with equal sides, it would be this.
SAS stands for Side, Angle, Side. This means we know 2 sides are equal, as well as the provided angle. This wouldn't apply, because there IS no provided angle, you only have sides.
ASA stands for Angle, Side, Angle. This would mean that 2 angles are identical (of course, by 2, i mean 1 for each triangle, same applies for SAS) and one provided Side is identical. We, of course, don't know what the sides or the angles are in this case (this part always gets me)
We can eliminate A right off the bat, because it says QRP is equal to TRS, which isn't right. QRP is only equal to SRT, because the order actually DOES matter. We can go ahead and eliminate D as well. Since we have no provided sides or angles (of course we can eyeball it and see that are equal, but your not supposed to really do that) we can assume it is most likely B over C. 
Your best answer provided would be QRP=SRT by SSS, or in other words, B
~Hope this helps, would appreciate brainliest!
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3 years ago
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Anna71 [15]

Answer:

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Step-by-step explanation:

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I is an imaginary number used to find the square root of a negative number.
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3 years ago
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