All categories

3 years ago

Please help! Only have 30min !

Mathematics

1 answer:

mrs_skeptik [129]3 years ago

3 0

Step-by-step explanation:

to change or make better - reform

???

right to vote - suffrage

runaway reading slave - Frederick Douglass

newspaper - the north star

she was women's right activist - Susan B

william lloyd garrison newspaper - the liberator

fight to reform prison - Dorthea Dix

You might be interested in

Help me please with this question

Marizza181 [45]

Your answer is 105 my friend!

6 0

3 years ago

How do you subtract rational expressions without a common denominator?

zubka84 [21]

You would have to make common denominators
consider a/b,c/d in Q
then a/b - c/d = ad/db - cb/bd = (ad-cb)/db for all a,b,c,d in R, exclude b,d=0
i.e. 1/2 - 1/4
=4/8 - 2/8 =(4-2)/8=2/8 =1/4

4 0

3 years ago

What is the length of the hypotenuse of a right triangle if each of the 2 legs is 7 units

inysia [295]

The answer is 7 √(2) or 9.899494937

6 0

3 years ago

Find the derivative of the function. f(x) = (8x − 5)−1 f '(x)

Volgvan

Answer:

x=4

Step-by-step explanation:

3 0

3 years ago

A thermometer is taken from an inside room to the outside, where the air temperature is 20° f. after 1 minute the thermometer re

fomenos

The change in the temperature is proportional to the difference in temperatures. Let's call the initial temperature of the room and the thermometer $E_0$ and the current temperature $E(t)$ where $t$ is the elapsed time in minutes. The outside temperature is 20 F.

Newton's Law of Cooling:

$E(t) - 20 = (E_0 - 20) e^{- k t}$

We're given $E(1)=70 \textrm{ and } E(5)=45$

$70-20 = (E_0 - 20) e^{-k}$

$45-20 =(E_0 - 20) e^{-5k}$

Dividing,

$\dfrac{50}{25}=e^{4k}$

$k = \dfrac 1 4 \ln 2$

Now,

$E(t) - 20 = (E_0 - 20) e^{- k t}$

$E_0 = 20 + (E(t) - 20)e^{k t}$

$E_0 = 20 + (E(1) - 20)e^{k}$

$E_0 = 20 + (70 - 20)e^{\ln 2/4}$

$E_0 = 20 + 50 \cdot 2^{1/4} \approx 79.46 \textrm{ degrees F}$

3 0

4 years ago