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3 years ago

AB is tangent to circle O at B. What is the length of the radius r

Mathematics

1 answer:

steposvetlana [31]3 years ago

4 0

check the picture below

Diane at your service :)

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Multiply the polynomials. (4x2 + 3x + 7)(8x – 5)

Triss [41]

32x^3+4x^2+41x-35

hope it helps

4 0

3 years ago

Read 2 more answers

The regular price of running shoes is $89.00. They are on sale for 20% off.

noname [10]

Answer:

a. 17.80 b. 71.20

Step-by-step explanation:

I used to hate percents. Let me teach you a trick:

take the og value (89) and multiply it by the percentage (20% or 0.2). Then once you have that answer (17.80), subtract it from the og value (89-17.80). That's your answer for how much you still owe! (71.20)

any other follow up questions? Just ask :)

8 0

3 years ago

The life, in years, of a certain type of electrical switch has an exponential distribution with an average life β=44. If 100 o

Bond [772]

Answer:

0.9999

Step-by-step explanation:

Let X be the random variable that measures the time that a switch will survive.

If X has an exponential distribution with an average life β=44, then the probability that a switch will survive less than n years is given by

$\bf P(X$

So, the probability that a switch fails in the first year is

$\bf P(X$

Now we have 100 of these switches installed in different systems, and let Y be the random variable that measures the the probability that exactly k switches will fail in the first year.

Y can be modeled with a binomial distribution where the probability of “success” (failure of a switch) equals 0.0225 and

$\bf P(Y=k)=\binom{100}{k}(0.02247)^k(1-0.02247)^{100-k}$

where

$\bf \binom{100}{k}$ equals combinations of 100 taken k at a time.

The probability that at most 15 fail during the first year is

$\bf \sum_{k=0}^{15}\binom{100}{k}(0.02247)^k(1-0.02247)^{100-k}=0.9999$

3 0

3 years ago

Two classes are combining to do a singing performance. The first class has 26 students and the second class has 22 students. If

valkas [14]

Well first lets add up all the students to see how many there are to split.

22 + 26 = 48

Now, let's split that into four groups.

48/4 = 12

So there will be 12 people in each group.

5 0

3 years ago

Read 2 more answers

A shopkeeper wants to make identical fruit baskets out of 32 apples, 40 peaches, and 96 bananas. What is the largest number of b

Finger [1]

4 baskets as the largest number divisible by 32 is 8 and the other 2 are also divisible by 8

7 0

3 years ago