Answer:
I) There are hours in 1 year.
II) The exact number of hours in one year is hours.
Step-by-step explanation:
Given : 1 hour=3600 seconds
1 year = 31556952 seconds.
To find :
I) Use scientific notation to estimate the number of hours in one year.
1 day = 24 hours
1 year = 365 days
So, number of hours in one year is given by,
In scientific notation,
So, there are hours in 1 year.
II) 1 year = 31556952 seconds.
1 hour = 3600 seconds
In one year the number of hour is given by,
In scientific notation,
So, the exact number of hours in one year is hours.
III) In two or more complete sentences, compare your answers to parts I and II. In your comparison, discuss similarities and differences.
- The exact numbers of hours using 365 days is 8760 which is written as in scientific notation but using the given data we get hours.
- Comparing these answers the first one has only 3 significant figures and the second answer has six significant figures.
- If we round these we get hours which has two significant numbers.
Answer:
2) D. y = 1,400 + 400m
Step-by-step explanation:
she starts the first month with the initial amount of 1400. this 1400 doesn't repeat monthly, so it isn't multiplied to anything. the 400m represents the 400 being added every month.
For A, substitute -4 for x in 2x + 5.
2(-4) + 5. Simplify.
-8 + 5. Add the terms together.
-3.
For B, substitute 2 for x in 2x + 5.
2(2) + 5. Simplify.
4 + 5. Add the terms together.
9.
In the given interval 1 < x < 6, the function is decreasing.
As seen from the graph, the value of function is lower at every next value of x than its previous value. For example value function is lower at x = 2 as compared to x = 1. Likewise the value is lower at x = 3 than x = 1 and x = 2 and this continues till x= 6. Therefore, the function is decreasing.
Another way to look at the problem is see the slope of the function. The line is constantly falling down, which means it is a decreasing function.
Answer is 28
y+z=4 => y=4-z
yz=3 => (4-z)z=3
=> z^2-4z+3=0
=> z=1 y=3 OR z=3 y=1
=>y^3 + z^3 =3^3+1=28