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3 years ago

PLEASE HELP

Mathematics

1 answer:

juin [17]3 years ago

8 0

Answer:

Step-by-step explanation:

A. She can cut 4 pieces that are 8.25 feet each. This uses all 33 feet of ribbon with no waste.

B. She can cut 5 pieces that are 6.6 feet each. This uses all 33 feet of ribbon with no waste.

C. She can cut 4 pieces that are 8 feet each. This adds up to 32 feet, and so 1 ft is wasted

D. She can cut 5 pieces that are 6.75 feet each. Not possible, as this adds up to 33.75 ft, which is more ribbon than Betty has.

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In places where there are crickets, the outdoor temperature can be predicted by the rate at which crickets chirp. One equation t

irina1246 [14]

Answer:

See explanation

Step-by-step explanation:

This question requires a list of options.

Since, there are none; I'll give a general explanation to answer this.

We have that:

$f = 14c + 40$

The general format of an equation in terms of f and c is:

$f = mc + b$

Where

$m = slope$ and $b = y\ intercept$

A true statement about the function above is:

The slope of the equation is 14

This means that at every minute, there's an additional 14 chirps from the cricket.

Another true statement about the function is that:

The y intercept is 40.

This means that the initial number of chirps by the cricket is 40

i.e. At time, c = 0 minutes.

There are 40 chirps.

A likely question could be to determine the number of chirps in (say) 5 minutes.

This means that:

$c= 5$

Substitute 5 for c in $f = 14c + 40$

$f = 14 * 5 + 40$

$f = 70 + 40$

$f = 110$

This implies there are 110 chirps in 5 minutes

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3 years ago

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Alik [6]

Answer:

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4 years ago

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A school survey found that 7 out of 30 students walk to

nika2105 [10]

Answer: 7/145

Step-by-step explanation:

The probability that the first student walks to school will be: = 7/30.

The probability of selecting the second student that walks to school will be: = 6/29.

Then we multiply both together and this will be:

= 7/30 × 6/29

= 7/145

5 0

3 years ago

Your grandmother gave you ₱1000 to start a college book fund. She also promised to add another ₱200 each month, if you add ₱50 m

Katena32 [7]

Answer:

A= ₱1000 + t( ₱250) ------where t is the time in months

Step-by-step explanation:

The principal amount ,P, is given as : ₱1000----- P=₱1000 ------equation (i)

Additional amounts to be added by grandmother = ₱200 monthly

Amount expected to add monthly = ₱50

Additional amounts in total added monthly = ₱200 + ₱50=₱250

Monthly amounts ,A, in the fund after the first month, t =1 month will be:

A=P + ₱250= ₱1000 + 1( ₱250) ------where t= 1, amount at end of month 1

A=P +₱250= ₱1000 + 2( ₱250)--------where t=2, amount at end of month 2

A=P +₱250= ₱1000 + 3( ₱250)---------where t=3, amount at end of month 3

A=P +₱250= ₱1000 + 4( ₱250)--------where t=4, amount at end of month 4

From the breakdown above of 4 months, the general equation of monthly amounts will be;

A= ₱1000 + t( ₱250) ------where t is the time in months

8 0

3 years ago

The area of a circle is 60.12cm find the length of the radius rounded to 2 dp.

Rufina [12.5K]

Answer:

Before you write the answer to your question, make sure the question is asking for the actual value of pi or 3.14.

If the question was asking for the question to be completed with the ACTUAL VALUE of pi, then your answer is ----> 4.37

If the question was asking for the question to be completed with the rounded of pi (3.14), then your answer is ----> 4.38

It's a subtle difference, but remember, there is no such thing as close in math, it's either right or wrong.

Step-by-step explanation:

Given: Circle's Area, 60.12

<u><em>As the value of pi was not directly stated, I will divide the answer into 2 portions, portion one with the answer with the actual infinite value of pi, and one where I will describe how to do it with 3.14 as pi. </em></u>

Explanation with 3.14:

First thing first, know the formula for calculating the area of a circle:

$A = \pi r^2$

$A$ stands for Area, and $r$ stands for Radius

Now, plug in the given values:

$60.12 = \pi r^2$

Next, replace 3.14 for pi:

$60.12 = (3.14)r^2$

Then, divide both sides by 3.14 ,which gives us:

$19.15 = r^2$

Please note: 19.15 is rounded

Anyway, to isolate $r$ , we take the square root of both sides:

$\sqrt{19.15} = \sqrt{x^2}$

The square root and square on the right side of the equation cancel out, and we are left with:

$4.38 = r$

Please note that 4.38 was rounded

4 0

2 years ago