Answer:
Step-by-step explanation:
The last (fourth) graph is that of the parent function y = √x. The negative sign in front of √x leads to reflection of this parent function graph in the x-axis. Thus, the correct graph of f(x) = -√x is the first one.
Cosine = adjacent / hypotenuse
cosine = 1 / square root (2)
Step-by-step explanation:
click on the image for the full answer
1x68
2x34
4x17
Hope that helps
Answer:
448 subscribers
Step-by-step explanation:
Given:
Number of randomly selected customers = 50
Out of 50 users, number using internet for more than 15 hours per week = 28
Now, number of subscribers = 800
Let the number of subscribers using internet for more than 16 hours per week be 'x'.
So, <em>out of 50 subscribers, 28 use internet for more than 15 hours</em>
Therefore<em>, out of 800 subscribers, 'x' use internet for more than 15 hours.</em>
Setting up a proportion and solving by cross multiplication method, we get:

Therefore, the number of subscribers using internet for more than 15 hours a week is 448 out of total 800 subscribers.