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4 years ago

7

Ann needs 42 feet of fabric. How many yards of fabric should she buy

2 answers:

djverab [1.8K]4 years ago

7 0

Let's use formulas!!
.
I KNOW YOU HATE FORMULAS.
.
So do I.
.
But we have to or else we get our pompis beaten up.
.
How many feet in a yard?
.
You are right!! 3 feet.
.
We have 42 feet.
.
What's 42 divided by 3?
.
Yup, 14.
.
So, you got 14 yards in 42 feet!
.
Hope this helps!
.
Any questions, ASK AWAY!!

gizmo_the_mogwai [7]4 years ago

4 0

14 since there are 3 feet in a yard.

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A population of mice is increasing exponentially. On Monday there were 120 most. One month later there were 132 most. Ready func

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Answer:

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The monthly rate is 10%

Step-by-step explanation:

Given

Let

$x \to months$

$y \to mice$

So, we have:

$(x_1,y_1) = (0,120)$ --- Monday

$(x_2,y_2) = (1,132)$ --- One month later

Required

The function

The function is represented as:

$y=ab^x$

In $(x_1,y_1) = (0,120)$ , we have:

$120 = a * b^0$

$120 = a * 1$

$120 = a$

$a=120$

In $(x_2,y_2) = (1,132)$ , we have:

$132 = a * b^1$

$132 = a * b$

Substitute: $a=120$

$132 = 120 * b$

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$b = \frac{132}{120}$

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$y=ab^x$

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$y =a(1 + r)^x$

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$1 + r = b$

Make r the subject

$r = b-1$

Substitute $b = 1.1$

$r = 1.1-1$

$r = 0.1$

Express as percentage

$r = 0.1*100\%$

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