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2 years ago

Study the dimensions of the shape. Find it’s perimeter. Use 3.14 for pi.

Mathematics

2 answers:

viktelen [127]2 years ago

6 0

It’s just a square that’s displaced. 12*9=108

Juli2301 [7.4K]2 years ago

3 0

Answer:

The perimeter is 55.68 cm.

Step-by-step explanation:

We have 2 sides as 9 cm.

We have the diameter as 12 cm. So, radius = 6 cm

Circumference of complete circle is = $2\pi r$ So, circumference of half circle will be $\pi r$

Now the perimeter of the whole figure will be given as:

$2(3.14\times6)+2(9)$

= $2(18.84)+18$

= $37.68+18$

= 55.68 cm

Therefore, the perimeter is 55.68 cm.

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The temperature of a cup of coffee varies according to Newton's Law of Cooling: dT dt equals negative k times the quantity T min

Maslowich

Answer:

67.3°C

Step-by-step explanation:

A = 25, T(0) = 100, T(1) = 90, find T(4)

dT/dt = -k(T - A)

d(T - A)/dt = -k(T - A)

d(T - A)/(T - A) = -k dt

ln(T - A) = lnC - kt

$T(t) -A=Ce^{-kt}\\T(t) = A + Ce^{-kt} = 25 + Ce^{-kt}\\T(0) = 25 + C = 100\\C=75$

$T(t) = 25 + 75e^{-kt}\\T(1) = 25 + 75e^{-k} = 90\\75e^{-k} = 65\\e^{-k} = \frac{65}{75}, k = ln\frac{75}{65} = 0.1431\\T(t) = 25+75e^{-0.1431t}\\T(4) = 25+75e^{-0.1431\times4} = 67.3$

4 0

2 years ago

Factor and write the x-intercepts 6x^2-5x-21 PLEASE HELP I NEED ANSWER

Alona [7]

Answer:

Your answer is in the picture.

Step-by-step explanation:

Visit the website if you want to factor polynomial.

4 0

1 year ago

What is B-CF?

Sholpan [36]

I'm guessing on the make up of the matrices.
First off let's look at [C][F].
[C]=
[F]=
[C][F]=
where each element of [C][F] comes from multiplying a row of [C] with a column of [F].
Example: First element is product of first row and first column.

.
.
.
Now that we have [C][F], we can subtract it from [B], element by element,

[B]-[C][F]=
[B]-[C][F]=
.
.
.
If this is not how the matrices look,please re-state the problem and be more specific about the make up of the matrices (rows x columns).
Here's an example.
[A] is a 2x2 matrix. A=[1,2,3,4].
The assumption is that [A] looks like this,
[A]=
[B] is a 3x2 matrix. B=[5,6,7,8,9,10]
[B]=

7 0

3 years ago

Jenna bought enough lattes for all her friends. Each latte was $3.50

alekssr [168]

Answer: 5 lattes

Step-by-step explanation: Our equation is 20 − 3.5x = 2.5, which means x = 5 lattes.

8 0

2 years ago

Read 2 more answers

Find 15 * 15 * 15 * 500 how does this compare to finding 45 x 500

andrew11 [14]

15 * 15 * 15 * 500 = 1,687,500. it's different from finding 45 * 500 because
15 * 15* 15 * 500 is the same as writing it as 15^3 * 500. This meaning you multiply the number 15 by itself 3 times, not add it 3 times, which is what
45 * 500 was showing. I hope this helped.

4 0

3 years ago