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True [87]
3 years ago
7

Jodi poured herself a cold soda that had an initial temperature of 40degreesF and immediately went outside to sunbathe where the

temperature was a steady 99degreesF. After 8 minutes the temperature of the soda was 50degreesF. Jodi had to run back into the house to answer the phone. What is the expected temperature of the soda after an additional 7 ​minutes?
Mathematics
1 answer:
kozerog [31]3 years ago
5 0

Answer:

58.75 degreeF

Step-by-step explanation:

The initial temperature of the Soda = 40degreeF

The temperature outside is steady at 99 degreeF

The temperature of the soda became 50 degreeF after 8 minutes

In 8 minutes, the Soda gained

(50 - 40)degreeF

= 10 degreeF

If the soda gains 10 degreeF in 8 minutes, in 1 minute, it will gain 10/8degreeF

Therefore in 7 minutes, the soda will gain (10/8)*7

= 70/8

= 8.75 degreeF

The expected temperature of soda after an additional 7 minutes = 50 + 8.75

= 58.75degreeF

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2. It is required to make a closed cylindrical tank of height 1 m and base diameter 140 cm
4vir4ik [10]

Answer:

It's required 7.48\ m^2 of sheet for the tank

Step-by-step explanation:

<u>Surface Area of a Cylinder</u>

Given a right cylinder of base radius r and height h, the surface area is calculated as follows:

S=2\pi r^2+2\pi r h

The cylindrical tank has a height of h=1 m and a base diameter of 140 cm. The radius is half the diameter, thus r=140/2 = 70 cm = 0.7 m. Substituting:

S=2\pi 0.7^2+2\pi (0.7)(1)

S=2\pi 0.49+1.4\pi

S=2.38\pi

\boxed{S=7.48\ m^2}

It's required 7.48\ m^2 of sheet for the tank

7 0
3 years ago
What is the missing side length in this right triangle?
Harrizon [31]

Answer:

A. 15

Step-by-step explanation:

Ooh, look! This triangle is a Pythagorean triple! Without even needing to use a formula, I can tell that you are correct and the answer is A. 15.

It's based off of a 3-4-5 right triangle, because 9-12-15 simplifies to that if you divide every term by 3. It's basically just a bigger version of a 3-4-5 triangle! Isn't math cool:)

5 0
3 years ago
Read 2 more answers
Help!!!! I don't get this
Serhud [2]
I believe it would be fifteen.
7 0
3 years ago
Read 2 more answers
PLEASE HELP!
leva [86]

Answer:

B. 56°

Step-by-step explanation:

We are given that m∠R is 66° and m∠T is 122°.

We can apply the supplementary rule since ∠S and ∠T are a linear pair. So, we can use ∠T to find ∠S through 180° - 122° = 58°.

Now, we can use ∠R and ∠S to find ∠Q.

66° + 58° = 124°

180° - 124° = 56°

8 0
3 years ago
Quincy claims that if 80 coats are sold, the outside temperature is likely to be about 42°
nikklg [1K]

No. Quincy should have used the trend line to find the corresponding x value when y=80.


6 0
3 years ago
Read 2 more answers
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