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3 years ago

7

What is the scale factor?

1 answer:

kkurt [141]3 years ago

6 0

35/42 =5/6

so the answer is 5/6.

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The length of an arc of a circle is 7.5 cm. The corresponding sector area is 37.5 cm squared. Find the radius of the circle

irinina [24]

R θ is the length = 7.5 cm

R^2 θ/2 is the area = 37.5 (cm)^2

Therefore

R = 2* 37.5 / 7.5 = 10 cm

3 0

3 years ago

Read 2 more answers

tank contains 250 liters of fluid in which 20 grams of salt is dissolved. Pure water is then pumped into the tank at a rate of 5

eimsori [14]

Solution :

Given data :

$c_{in}$ = 1 g/L

$r_{in}$ = 5 L/min

$r_{out}$ = 5 L/min

$v_0$ = 250 L

$A_0$ = 20 g

∴ $r_{net} = r_{in}- r_{out}$

= 5 - 5

= 0

$c_{out} = \frac{A}{250} \ g/L$

Now, $\frac{dA}{dt}=(r_{in} \times c_{in}) - (r_{out} \times c_{out})$

$\frac{dA}{dt} = 5-5\left(\frac{A}{250}\right)$

$\frac{dA}{dt}+5 \left(\frac{A}{250}\right) = 5$

$\frac{dA}{dt}+5 \left(\frac{A}{250}\right) = 5 \text{ with} \ A_0 = 20$

Integrating factor = exp(5 t/250)

Therefore,

$A \times \exp (5t \ /250) = \text{integral of}\ 5 \times \exp (5t / 250) + C$

Put $A_0=250+C$

C = -230

$A \times \exp(5t/250) = 250 \exp(5t/250) + (-230)$

$A(t) = 250-230 \exp(-5t/250)$

$A(t) = 250-230e^{\left(\frac{-t}{50}\right)} \ g$

5 0

3 years ago

I will give u brainliest

Dmitry_Shevchenko [17]

Answer:

1 & 2 = Right Triangles

3 & 4 = Not Right Triangles

Step-by-step explanation:

Solved Using Pythagorean Theorem:

1) $9^{2} + 12^{2}$ = 225

$15^{2}$ = 225

2) $15^{2} + 36^{2}$ = 1521

$39^{2}$ = 1521

3) $10^{2} + 26^{2}$ = 776

$28^{2}$ = 784

4) $10^{2} + 12^{2}$ = 244

$16^{2}$ = 256

3 0

3 years ago

A culture started with 1,000 bacteria. After 3 hours, it grew to 1,100 bacteria. Predict how many bacteria will be present after

AlladinOne [14]

A culture started with 1,000 bacteria. After 3 hours, it grew to 1,100 bacteria. Predict how many bacteria will be present after 17 hours.

8 0

3 years ago

Find the value of x <br>a. 31<br>b. 46<br>c. 52<br>d. 107

forsale [732]

The answer is C.52

4x-101=2x+3
2x =104
X=52

3 0

3 years ago