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2 years ago

True or false: 3^-1 x 3^-1=3^1

Mathematics

1 answer:

Tresset [83]2 years ago

5 0

Answer:

the answer I got is false

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The probability of event X is 30%. The probability of event Y is 40%. If events X and Y are mutually exclusive, what is the prob

Soloha48 [4]

The probability of event X or Y is P = 0.7, or, in percentage form, the probability is 70%.

<h3>How the get the probability of event X or Y?</h3>

First, two events are mutually exclusive if these events can't happen at the same time.

This means that if happens X, with a 30% of probability, then Y can't happen.

If happens Y, with a 40% of probability, then X can't happen.

Then the probability of X or Y (the probability that one of these two events happens, not both) is just the addition of the two individual probabilities.

Then we have:

P(X or Y) = 0.3 + 0.4 = 0.7

Or, in percent form, we get:

P(X or Y) = 70%

The probability of event X or Y is just 70%.

If you want to learn more about probability:

brainly.com/question/25870256

#SPJ1

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2 years ago

Spaceship Earth, a spherical attraction at Walt Disney worlds epcot center, has a diameter of 50 meters. Find the surface area o

gladu [14]

Answer:

The surface area of the structure is $SA=2,500\pi\ m^{2}$

Step-by-step explanation:

we know that

The surface area of a sphere is equal to

$SA=4\pi r^{2}$

In this problem we have

$r=50/2=25\ m$ -----The radius is half the diameter

substitute

$SA=4\pi (25)^{2}$

$SA=2,500\pi\ m^{2}$

5 0

3 years ago

State the smallest possible value of x if x is an integer for the following inequality.

Liono4ka [1.6K]

Answer: -22 is the smallest possible value of x

7 0

3 years ago

A jewelry store has 311.75 ounces of 14-carat gold in stock.

WARRIOR [948]

Answer:

$\boxed{\text{(a) 86 necklaces; (b) \$2220}}$

Step-by-step explanation:

(a) Number of necklaces

3⁵/₈ = 3.625

$\text{No. of necklaces} = 311.75\text{ oz} \times \dfrac{\text{1 necklace}}{3.625\text{ oz}} = \textbf{ 86 necklaces}\\\\\text{You can make } \boxed{\textbf{86 necklaces}} \text{ from 311.75 oz of 14K gold}$

(b) Value of gold in each necklace

There are 3.625 oz of 14K gold in each necklace. Pure gold is 24K.

$\text{Mass of pure gold} = \text{3.625 oz} \times \dfrac{\text{14K}}{\text{24K}} = \text{2.1146 oz}$

Pure 24K gold is worth $1050/oz.

$\text{Value of pure gold} = \text{2.1146 oz} \times \dfrac{\text{\$1050}}{\text{1 oz}} = \textbf{\$2220}\\\\\text{The value of the gold in each necklace is } \boxed{\textbf{\$2220}}$

4 0

3 years ago

Which process do we use in reverse to solve two-step equations?

lesya692 [45]

Answer: Inverse Operation

Step-by-step explanation:

6 0

3 years ago