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Radda [10]
3 years ago
15

please help: Elaine takes 7 min to ride 18 blocks. what is her unit rate. how long should it take her to go 50 blocks???

Mathematics
1 answer:
Kobotan [32]3 years ago
5 0

Answer:

unit rate = 2.57 blocks / min

Time = 19.444 ...

Step-by-step explanation:

The unit rate is how far she can travel in 1 minute.

Rate is defined as distance / time

Givens

distance = 18 blocks

time = 7 minutes

Solution

rate(r) = distance(d) / time(t)

r = 18 blocks / 7 minutes

r = 2.57143 blocks / minute

==========

Set up the ratio for 50 blocks

1 minute / 2.57143 blocks = x / 50 blocks    Multiply both sides by 50

1 * 50 / 2.57143 = x * 50 / 50

x = 50 / 2.57143

x = 19.4444...

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Mrs. Eaton's dass is participating in the "Box Teps for Education campaign. On the first day, her
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The number of tops on the 6th day based on the exponential model is 64, and the number of tops on the 6th day based on the linear model is 17.

<h3>What is an exponential function?</h3>

It is defined as the function that rapidly increases and the value of the exponential function is always a positive. It denotes with exponent \rm y = a^x

where a is a constant and a>1

First day class collected = 2 tops

Third day class collected = 8 tops

The exponential function can be modelled:

\rm D(N) = 2^N

D(1) = 2  (first day)

D(3) = 8  (third day)

D(6) = 64 (sixth day)

The linear function can be modeled:

D(N) = 3N -1

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D(3) = 8 (third day)

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4 0
2 years ago
Suppose the profit a honda dealership makes on the next 5 accords it sells are:564, 1,000, 848, 1,495, 1,348. calculate the stan
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mean = (564 + 1000 + 848 + 1495 + 1348) / 5 = 5255 / 5 = 1051

now we subtract the mean from every data point, then square it
564 - 1051 = -487......-487^2 = 237169
1000 - 1051 = -51......-51^2 = 2601
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1348 - 1051 = 297......297^2 = 88209

now find the mean of the results.....but know when ur dealing with a sample instead of the whole population, u divide by 1 number less...so instead of dividing by 5, u divide by 4.
(237169 + 2601 + 41209 + 197136 + 88209) / 4 = 566324 / 4 = 
141581.....this is called ur variance

now take the square root of the variance and u have ur standard deviation
sqrt (141581) = 376.272 rounds to 376.27 <==
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