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faltersainse [42]
3 years ago
6

the probability that jenya recieves 4 spam-emails is 4% . If she recieves 520 emails a week, how many can you expect to be spam?

Mathematics
1 answer:
Vlada [557]3 years ago
7 0
20.8 or if you have to round, 21
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A number is squared. The result is squared, then that result is squared. The final number is 6561. What was the original number?
MissTica

The original number is 3.

I actually began with the guess-and-check method, but seeing as that won't always work, let's go over the formal way. To get the original number, you first need to determine how many times the number was squared.

To make it simple, let's use x to focus on the exponents. The number was squared 3 times, so x^2, x^2, x^2. Basically, you need to multiply. 2 * 2 * 2 = 8. So, now find the 8th root of 6561 (depending on the calculator, you can just input it). You should come up with 3. Let me know if this part confuses you.

To find the next 2 numbers, you just need to continue the pattern.

6561^2 = 43,046,721

43,046,721^2 = 1,853,020,188,851,841

To my knowledge, which means this could be wrong, they're both perfect squares. Since the number to get them both were whole numbers, they should both have a square root that equals a whole number.

3 0
3 years ago
WILL GIVE BRAINLEST
Viefleur [7K]

Answer:

do we answer all of them are just one

5 0
3 years ago
Question 21 is probably the hardest question on this homework
Snezhnost [94]
-15+5x= 20

5x= 35
x= 7

20= -15+5x

35= 5x

7 = x
7 0
3 years ago
Read 2 more answers
Find the perimeter of each figure by writing and solving an ewuation for the varible, x​
grandymaker [24]
6(x-1)
4x

X = 6*x-1*6/6x-6=4x
X= -6=4x-6x
X=-6=-2x
Value of x Is 3
8 0
3 years ago
Explain how a number line can be used to find the difference for 34-28?
Vikentia [17]
You could start on 34 on the number line and jump back 28 times to get your answer.
8 0
3 years ago
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