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andrew-mc [135]
3 years ago
8

Need help on that one............

Mathematics
1 answer:
sergij07 [2.7K]3 years ago
6 0
The answer for your question is b and i dont know why they say ur answers need to be 20 characters long but its b
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A water tank has a square base of area 5 square meters. Initially the tank contains 70 cubic meters. Water leaves the tank, star
ANEK [815]

Answer:

9.2\ \text{m}

Step-by-step explanation:

b = Surface area of base = 5 square meters

Volume of water in tank = 70 cubic meters

The rate at which the volume is reducing is

\dfrac{dV}{dt}=2+4t\\\Rightarrow dV=2+4tdt

Integrating from t=0 to t=3

V=\int^3_0(2+4t)dt\\\Rightarrow V=2t+2t^2|_0^3\\\Rightarrow V=2\times 3+2\times 3^2-0\\\Rightarrow V=24

Volume of water remaining in the tank is 70-24=46\ \text{m}^3

Suface area of base \times depth = Volume

5\times d=46\\\Rightarrow d=\dfrac{46}{5}\\\Rightarrow d=9.2\ \text{m}

The depth of the water remaining in the tank is 9.2\ \text{m}.

3 0
3 years ago
What is 45 multiplied by 5x9 divide by 5x3 add 67 and divide it by 7. What is the answer! ASAP!
Anarel [89]

Answer:

28.857

Step-by-step explanation:

4 0
3 years ago
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Please help 2=*255/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="93a5a6aad3bea6a6a5a6a5a3aa">[email&#
leva [86]
The answer is 45 grace
5 0
3 years ago
Please ✨help✨ I need this as soon as possible
11111nata11111 [884]

Answer:

no it is not

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5 0
3 years ago
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g Nationwide, a certain disease occurs only a small proportion of people (.000215). A certain town has 74,000 residents. Use the
Andrei [34K]

Answer:

The probability that the town has 30 or fewer residents with the illness = 0.00052.

Step-by-step explanation:

So, we have the following set of data or information or parameters given from the question above and they are; the number of people living in that particular society/community/town = 74,000 residents and the proportion of people that the diseases affected = .000215.

The first step to do is to determine the expected number of people with disease. Thus, the expected number of people with disease = 74,000 × .000215 = 15.91.

Hence, the probability that the town has 30 or fewer residents with the illness = 1.23 × 10^-7 × 15.91^30/ 2.65253 × 10^-32 = 0.00052.

Note the formula used in the calculating the probability that the town has 30 or fewer residents with the illness =  e^-λ × λ^x/ x!

8 0
2 years ago
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