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3 years ago

9

It used to take Lizzy 11 minutes to run a mile. Now she runs the mile in 8 minutes. What is the percent of increase in her speed

? Round to the nearest whole percent

2 answers:

Olegator [25]3 years ago

8 0

Answer:

g

Step-by-step explanation:

Bumek [7]3 years ago

6 0

Answer:

37%

Step-by-step explanation:

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PLEASE HELP<br> what is 30th term of -12, -3, 6, 15

hoa [83]

Answer:

249

Step-by-step explanation:

We can see that the difference of every term in the given sequence is 9, because -12 + 9 = -3, -3 + 9 = 6 and 6 + 9 = 15. We may therefore assume that the sequence is <em>arithmetic </em>(a fancy word of saying that a sequence is increasing with a constant value every term).

Since the difference of every term is 9, we know that the explicit form of the sequence (where the value of every term is expressed in terms of the term number) is in the form $9n+c$ , where $n$ is the term number and $c$ is a constant we are going to figure out right now.

We know that the first term of the sequence is -12, so we see that $9(1) + c = -12$ and hence $c=-21$ . Therefore, the 30th term of the sequence is $9(30) - 21 = 249$ .

5 0

3 years ago

Riya is applying mulch to her garden. she applies it at a rate of 250 , 000 cm 3 250,000 cm 3 250, comma, 000, start text, space

Tatiana [17]

The rate in

$\frac{ {m}^{3} }{ {m}^{2} } \: is \:0.25\frac{ {m}^{3} }{ {m}^{2} }$

<h3>How to find rate is riya applying mulch in m^3/m^2 ?</h3>

given that riya applies it at a rate of 250,000 cm^3 of mulch for every m^2 of garden space.

we already know that 1m = 100cm.

so, each side of this cube is 100cm in length.

so, $100 \times 100 \times 100 \: {cm}^{3} \: in \: {m}^{3}$

To find what is the volume in cubic metres.

$\frac{250000}{10000000} = \frac{1}{4} = 0.25 \frac{ {m}^{3} }{ { m}^{2} }$

so, the rate is $0.25 \frac{ {m}^{3} }{ {m}^{2} }$

Learn more about problems on garden, refer :

https://brainly.in/question/50618467

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Disclaimer : This question was given incomplete on portal.Here is complete question.

Question : Riya is applying mulch to her garden.She applies it at a rate of 250,000 cm^3 of mulch for every m^2 of garden space. At what rate is riya applying mulch in m^3/m^2

8 0

2 years ago

Of the teacups in Whitney's Tea Shop, 2/5 are purple and another 1/10 are white. What fraction of the teacups are either purple

Degger [83]

1/2
2/5 is 4/10, and 1/10 makes 5/10, which is 1/2

3 0

3 years ago

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HELP MEE PLZZZZ I DON'T UNDERSTAND THIS

Damm [24]

Answer: Choice D. $6.44 \times 10^{-4}$

========================================================

Work Shown:

We multiply the coefficients 9.2 and 7 to get 64.4, which is the same as 6.44*10^1 in scientific notation. When multiplying exponential expressions with the same base, we add the exponents

This is what the steps could look like

$\left(9.2 \times 10^{-9}\right)\times\left(7 \times 10^{4}\right)\\\\\left(9.2\times7\right)\times\left(10^{-9} \times 10^{4}\right)\\\\\left(64.4\right)\times\left(10^{-9+4}\right)\\\\\left(6.44\times 10^{1}\right)\times\left(10^{-5}\right)\\\\6.44\times\left(10^{1}\times 10^{-5}\right)\\\\6.44\times\left(10^{1+(-5)}\right)\\\\6.44\times 10^{-4}\\\\$

The final result is in scientific notation as the coefficient c is restricted such that $0 \le c < 10$

7 0

3 years ago

Did we invent math or did we discover it? I need help asap plz. Don't answer if you don't know plz

Wewaii [24]

Answer:

The only reason mathematics is admirably suited describing the physical world is that we invented it to do just that. It is a product of the human mind and we make mathematics up as we go along to suit our purposes. ... Mathematics is not discovered, it is invented.

Step-by-step explanation:

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3 years ago

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