Answer:
1/4 - spade
3/4 - not spade
Step-by-step explanation:
There is 13 spades in a deck of 52 cards, so the probability would be 13/52, simplified to 1/4
4/4 - 1/4 = 3/4
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2(-2.5)(-7.5) + 2(-2.5)^{2}
= 50
Answer:
Correct
Step-by-step explanation:
Given:
In an asteroid field, 75% of the asteroids are carbonaceous asteroids.
There are 375,000 carbonaceous asteroids in the asteroid field.
To find:
The number of asteroids that are not carbonaceous.
Solution:
Let the total number of asteroids be x.
According to question,
Divide both sides by 0.75.
Asteroids not carbonaceous = Total asteroids - Carbonaceous asteroids
Therefore, 125,000 asteroids are not carbonaceous.