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3 years ago

10

NEED CORRECT ANSWER...

1 answer:

Misha Larkins [42]3 years ago

6 0

39.50-23.76-2.57-1.49=11.68

take the sales and subtract the expenses

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Use f(x)=1/2x and f^-1(x)=2x to solve the problems f^1(-2), f(-4), f(f^-1(-2)?

neonofarm [45]

F^1(-2) = 2(-2) = -4
f(-4) = 1/2 * -4 = -2

f(f^-1(x)) = x so answer is -2

8 0

3 years ago

Read 2 more answers

Shanta got 215 marks in an examination. if she had got 10 marks more, she would have scored 60% of the total marks. What are the

ololo11 [35]

She got 215....but if she would have gotten 10 more, she would have scored 60% of the total marks......so if she got (215 + 10) = 225 she would have scored 60% of the total marks...

so 60% of the total marks = 225
0.60x = 225
x = 225/0.60
x = 375 <===

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3 years ago

What is a fraction between 2/3 and 4/7

Zigmanuir [339]

Answer:

3/5

Step-by-step explanation:

it is between 2/3 and 4/7

4 0

2 years ago

Sodium-24 has a half-life of 15 hours. how many grams of a 900 g sample will remain after 90 hours

raketka [301]

Answer: Option 'B' is correct.

Step-by-step explanation:

Let the initial concentration be

$N_0=900\ g$

Let concentration after t= 90 hours be N

Since we have given that Sodium-24 has a half life of 15 hours i.e.

$t_{\frac{1}{2}}=15$

So, According to question,

$\text{ Number of half lives }=\frac{t}{t_{\frac{1}{2}}}\\\\\text{ Number of half lives }=\frac{90}{15}\\\\\text{ Number of half lives }=6$

As we know that

$\frac{N}{N_0}=(\frac{1}{2})^n\\\\N=N_0\times (\frac{1}{2})^n\\\\N=900\times (\frac{1}{2})^6\\\\N=\frac{900}{64}\\\\N=14.0625\ g$

Hence, Option 'B' is correct.

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3 years ago

At 9.00 AM, two trains are 715 miles apart traveling toward each other on parallel tracks. If one train is traveling at a rate t

prisoha [69]

One train will be travelling at 60 mph, and the other train will be travelling at 70 mph. 70 * 5.5 = 385, 60 * 5.5 = 330. 330 + 385 = 715

3 0

3 years ago