Answer:
It equals 420.
Step-by-step explanation:
Answer:
22.51% probability that fewer than 4 of them use their smartphones in meetings or classes.
Step-by-step explanation:
For each adult, there are only two possible outcomes. Either they use their smartphones in meetings or classes, or they do not. The probability of an adult using their phone is independent of other adults. So we use the binomial probability distribution to solve this question.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
In which is the number of different combinations of x objects from a set of n elements, given by the following formula.
And p is the probability of X happening
47% use them in meetings or classes.
This means that
10 adult smartphone users are randomly selected
This means that
Find the probability that fewer than 4 of them use their smartphones in meetings or classes.
In which
22.51% probability that fewer than 4 of them use their smartphones in meetings or classes.
The horizontal distance between the base of the ladder and the wall is 12.6 feet.
<h3>What is t
rigonometric ratio?</h3>
Trigonometric ratio is used to show the relationship between the sides and angles of a right angled triangle.
Let d represent the distance between the base of the ladder and the wall.
Using trig ratio:
cos(61) = d/26
d = 12.6 feet
The horizontal distance between the base of the ladder and the wall is 12.6 feet.
Find out more on trigonometric ratio at: brainly.com/question/24349828
First you need to distribute
-16 = 2u-10-5u
Combine like terms
-16 = -3u-10
Add 10 to each side
-6 = -3u
Divide -3 from each side
u = 2