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GarryVolchara [31]
3 years ago
6

Eathan ran 11 miles in 2 hours. what is the unit rate of miles to hours

Mathematics
2 answers:
spayn [35]3 years ago
6 0

Answer:

5.5:1

Step-by-step explanation:

murzikaleks [220]3 years ago
3 0

Answer:

5.5 miles per hour

Step-by-step explanation:

11/2= 5.5

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rosijanka [135]

Answer:-26

Step-by-step explanation:

4 0
3 years ago
What is the surface area of the figure? Use 3.14 for π.
fredd [130]

Answer:

Option 3

Step-by-step explanation:

We want to work out the surface-area

This is a cylinder and the formula for the surface area of a cylinder is :

2πrh+2πr^2

^ means to the power of

The radius is 15

The length is 18

2(3.14)(15)(18) + 2(3.14){15}^2

Part 1:

(6.28)(15)(18)

(6.28)(270)

1695.6

Part 2:

First, we do the exponents,

15^2 = 225

(6.28)(225)

1413

Part 3:

1695.6 + 1413 = 3108.6

Answer: 3108.6

Hope this helps :)

6 0
2 years ago
Read 2 more answers
Please help i really need this
creativ13 [48]

Answer:

D

Step-by-step explanation:

You have the correct answer.

6 0
2 years ago
Alexander Litvinenko was poisoned with 10 micrograms of the radioactive substance Polonium-210. Since radioactive decay follows
koban [17]

Answer:

The amount of Polonium-210 left in his body after 72 days is 6.937 μg.

Step-by-step explanation:

The decay rate of Polonium-210 is the following:

N(t) = N_{0}e^{-\lambda t}     (1)

Where:

N(t) is the quantity of Po-210 at time t =?

N₀ is the initial quantity of Po-210 = 10 μg

λ is the decay constant  

t is the time = 72 d  

The decay rate is 0.502%, hence the quantity that still remains in Alexander is 99.498%.    

First, we need to find the decay constant:

\lambda = \frac{ln(2)}{t_{1/2}}    (2)

Where t(1/2) is the half-life of Po-210 = 138.376 days

By entering equation (2) into (1) we have:

N(t) = N_{0}e^{-\frac{ln(2)}{t_{1/2}}*t}} = 10* \frac{99.498}{100}*e^{-\frac{ln(2)}{138.376}*72} = 6.937 \mu g    

Therefore, the amount of Polonium-210 left in his body after 72 days is 6.937 μg.  

I hope it helps you!  

8 0
3 years ago
Complete the factoring by writing the polynomial as the product of two factors.
antiseptic1488 [7]

Answer:

ikhjgvyiho

Step-by-step explanation:

6 0
3 years ago
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