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coldgirl [10]
3 years ago
8

To keep heating costs down for a structure, architects want the ratio of surface area to volume as small as possible. An express

ion for the ratio of the surface area to volume for the square prism shown is 2b+4h/bh. Find the ratio when b = 15 ft and h = 10 ft.
Mathematics
2 answers:
Vikentia [17]3 years ago
7 0
For the answer to the question above, 
10/12 can be simplified down
I would divide both sides by 2 for starters, then you can see if it needs to be simplified more
10/2=5
12/2=6
Since you have an odd and an even number, you can't simplify it anymore, as 5 and 6 have no common numbers.
The correct answer is 5/6
FromTheMoon [43]3 years ago
7 0

Answer:

The ratio is \frac{7}{15} when b = 15 ft and h = 10 ft.

Step-by-step explanation:

The ratio of the surface area to volume for the square prism is given by the expression

\frac{2b+4h}{bh}

We have to find the ratio when b = 15 ft and h = 10 ft.

Substitute b=15 and h=10 in the given expression.

\frac{2(15)+4(10)}{(15)(10)}

\frac{30+40}{150}

\frac{70}{150}

\frac{7}{15}

Therefore the ratio is \frac{7}{15} when b = 15 ft and h = 10 ft.

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If it takes 12 days to fill a tank using four taps, how long would it take to fill the same tank using 6 taps instead?
eimsori [14]

Answer:

8 days

Step-by-step explanation:

5 0
3 years ago
Simplify this expression.
vazorg [7]
The answer is A 616


M
5 0
3 years ago
Please may someone help with c
german

Step-by-step explanation:

Distance between two villages = d

(a) \:  \frac{4}{5}  \: of \: d =  \frac{4}{5} d \\  \\ (b) \:  \frac{3}{4}  \: of \: d =  \frac{3}{4} d  \\  \\ (c) \: \frac{4}{5} d -   \frac{3}{4} d = 1.5 \\  \\  \therefore \:   \bigg(\frac{4}{5} -   \frac{3}{4} \bigg) d = 1.5 \\  \\ \therefore \:   \bigg(\frac{4 \times 4 - 3 \times 5}{5 \times 4} \bigg) d = 1.5 \\  \\ \therefore \:   \bigg(\frac{16- 15}{20} \bigg) d = 1.5 \\  \\ \therefore \:   \bigg(\frac{1}{20} \bigg) d = 1.5 \\  \\ \therefore \: d = 1.5 \times 20 \\  \\ \:  \:  \:  \:  \:  \huge \orange{ \boxed{{ \therefore \: d = 30}}}

4 0
3 years ago
Im not sure if there right or not
alina1380 [7]
They are both correct.
7 0
3 years ago
Can someone please help me out? It would really make me happier if you did.
asambeis [7]

Answer:

B) 8 and 24.

Step-by-step explanation:

Just by looking at the answer choices, since one number must be three times the other, we can determine that the correct answer is B.

Regardless, let's work this out mathematically. Let the first number be <em>a</em> and the second number be <em>b</em>.

Their difference is 16. Hence:

a-b=16

The first number is three times the second number. So:

a=3b

Substitute:

3b-b=16

Solve for <em>b</em>. Subtract:

2b=16

And divide both sides by two:

b=8

So, the second number is 8.

And since the first number is three times the second, the first number is 24.

Our answer is B as expected.

5 0
3 years ago
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