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3 years ago

Need help please help

Mathematics

1 answer:

aleksandrvk [35]3 years ago

5 0

okokok

Step-by-step explanation:

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A jar contains 4 cherry cough drops, 8 lemon cough drops, and 10 honey cough drops. You choose one cough drop without looking. W

AlexFokin [52]

Answer:

You have an 8/14 chance of choosing lemon.

Step-by-step explanation:

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3 years ago

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A light bulb has a lifetime X that is exponentially distributed with a mean 340 hours. Find the probability that the bulb lifeti

LUCKY_DIMON [66]

Answer:

0.7026

Step-by-step explanation:

Let X denote the lifetime of light bulb. Given $X \sim Exp(\lambda)$ where the mean is $E(X) = 340 =\frac{1}{\lambda} \implies \lambda = \frac{1}{340} = 0.00294$ .

Recall that,

$\displaystyle P(X>x) = 1 - \int_0^x e^{-\lambda x} = 1 - (1 - e^{-\lambda x} = e^{-\lambda x}$

$\displaystyle P(X>220 | X>100) = \frac{P(X>220,X>100)}{P(X>100)} = \frac{e^{-\lambda \times 220}}{e^{-\lambda \times 100}} = \frac{0.5236}{0.7452} = 0.7026$

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3 years ago

Find the circumference and area of the circle. Use 3.14 or 22/7 for π.

Hoochie [10]

Answer:

circumference: 62.8 ft
area: 314 ft²

Step-by-step explanation:

The circumference is given by the formula ...

C = πd

Using the given numbers, the circumference is ...

C = (3.14)(20 ft) = 62.8 ft

The area is given by the formula ...

A = πr² . . . . . where radius r is half the diameter

Using the given numbers, the area is ...

A = 3.14(10 ft)² = 314 ft²

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3 years ago

-2x +8 < 42 <br> plz help solve for x<br> BRAINLIEST

kicyunya [14]

Answer:

Inequality Form: x > -17

Interval Notation: (-17, ∞)

Step-by-step explanation:

brainliest would be great

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3 years ago

Gerri spends 1/21 of her money on pencils and 2/21 on paper. What fraction of her money does she spend. Give the answer in simpl

BigorU [14]

Answer:

Gerri spends 1/7 (A).

Step-by-step explanation:

If Gerri spends 1/21 of her money on pencils and 2/21 of her money on paper, adding these two fractions together will give us the total fraction of her money that she spent. Since 1/21 and 2/21 have the same denominator, we can add the numerators to get 3/21. However, fractions must always be in simplest form, meaning if the numerator (top number) and denominator (bottom number) can both be divided evenly by the same factor, then the fraction can be simplied to lower numbers. In this case the number 3 and the number 21 can both be divided evenly by 3: (3÷3)/21÷3) = 1/7.

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3 years ago

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