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Lerok [7]
2 years ago
12

Please help me!!!!!!!!!!!!!!!!!!

Mathematics
1 answer:
Igoryamba2 years ago
6 0
Answer (b): There is a strong positive correlation between time studied and test scores.

Reason:
(1) it is upward, so it is positive.
(2) They are closely packed, so there is a strong correlation.
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A large mixing tank initially contains 1000 gallons of water in which 40 pounds of salt have been dissolved. Another brine solut
sergey [27]

Answer:

If A(t) represents the amount of salt in the tank at time t, the correct differential equation for A is is dA/dt =  15 - 0.005A

Option C) dA/dt =  15 - 0.005A is the correction Answer

Step-by-step explanation:

Given the data in the question;

If A(t) represents the amount of salt in the tank at time t, the correct differential equation for A is?

dA/dt = rate in - rate out

first we determine the rate in and rate out;

rate in = 3pound/gallon × 5gallons/min = 15 pound/min

rate out = A pounds/1000gallons × 5gallons/min  = 5Ag/1000pounds/min

= 0.005A pounds/min

so we substitute

dA/dt = rate in - rate out

dA/dt =  15 - 0.005A

Therefore, If A(t) represents the amount of salt in the tank at time t, the correct differential equation for A is is dA/dt =  15 - 0.005A

Option C) dA/dt =  15 - 0.005A is the correction Answer

8 0
3 years ago
2(n2 + 1) – 3(n2 – 3) + 3(2n2 – 2),<br> n=(1/4)
IceJOKER [234]

]Answer:

5\frac{5}{16}

Step-by-step explanation:

Substitute the value of the variable into the equation and simplify.

2(\frac{1}{4} ^{2} +1-3(\frac{1}{4} ^{2} -3)+3((2*\frac{1}{4}^{2}  )-2)

Solve it out.

Multiply / divide / add / subtract everything out.

4 0
3 years ago
How do go math lesson 2.5 3rd grade?
schepotkina [342]
Send a picture of it ok then i answer
5 0
3 years ago
Read 2 more answers
AC is tangent to circle O at A. The Diagram is not to scale.
statuscvo [17]

Answer:

  • B. 64°

Step-by-step explanation:

<u>Given:</u>

  • mBY = 52°

<u>Inscribed angle measure is half the intercepted arc:</u>

  • m∠BAY = 1/2(52°) = 26°

<u>The angle between the diameter and tangent is right angle:</u>

  • m∠BAC = 90°

<u>According to angle addition postulate:</u>

  • m∠YAC = m∠BAC - m∠BAY
  • m∠YAC = 90° - 26° = 64°

Correct choice is B

7 0
2 years ago
Read 2 more answers
The answer of this question
dolphi86 [110]

Answer:

i think it is c

Step-by-step explanation:

not 100% sure tho

4 0
3 years ago
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