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maw [93]
3 years ago
12

The glass window pane has an area of 80 square centimeters. The width of the pane is 8 centimeters.

Mathematics
2 answers:
liberstina [14]3 years ago
7 0

Answer:

10 cm

Step-by-step explanation:

Area = length × width

80 = length × 8

length = 10

Brums [2.3K]3 years ago
6 0

Answer:

The length is 10 cm

Step-by-step explanation:

The area is given by length times width

A = l*w

We have an area of 80 cm^2 and a width of 8

80 = l*8

Divide each side by 8

80/8 = 8l/8

10 = l

The length is 10 cm

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The formula to find how many different ways are there to choose a subgroup of r things from a group of n things is

\frac{n!}{(n-r)!}

Here, you have 7 trophies and you want to choose 4 of them, so you have

\frac{7!}{(7-4)!}\text{ = }\frac{5040}{6}=840

So there are 840 ways to choose your 4 trophies out of the 7 you have.

6 0
1 year ago
The total volume of a tree increases 6% each year. What will its volume be after 7 years if its volume is 5 cubic meters now? A.
CaHeK987 [17]

Complete Question:

The total volume of a tree increases 6% each year. What will its volume be after 7 years if its volume is 5 cubic meters now? A. 5(0.06)^7 B. 5(7)(0.06) C. 5(1.06)^7 D. 5(7)(1.06)

Answer:

C. 5(1.06)^7

Step-by-step explanation:

The volume of a tree increases by 7% every year

The formula we would be using is

V(t) = Vo (1 + r)t

Where V(t) = Volume after t years

Vo = Present of initial volume

r = rate of increase

t = time

From the question,

V(t) = Volume after t years = unknown

Vo = Present of initial volume = 5m³

r = rate of increase = 6% = 0.06

t = time = 7 in years

V(t) = 5 × ( 1 + 0.06)^ 7

V(t) =(5)(1.06)^7

Therefore, its volume be after 7 years if its volume is 5 cubic meters now is

Option C: (5)(1.06)^7

4 0
3 years ago
I need help with 1 and 2
ratelena [41]

Answer:3


Step-by-step explanation:


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3 years ago
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Answer:

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Step-by-step explanation:

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90 - 12 = w + 2w

78 = 3w

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