<span>2.3x10^19 kg
This is a matter of multiplication using scientific notation. First, multiply the mantissas
3.5 * 6.6 = 23.1
Then add the exponents
-2 + 20 = 18
So we initially have 23.1x10^18
But 23 is too large (the number has to be greater than or equal to 1 and less than 10). So divide the 23.1 by 10 and add 1 to the exponent, getting
2.31x10^19
Then since the least accurate value we have for input has only 2 significant digits, round the result to 2 significant digits, getting
2.3x10^19 kg</span>
Given function:
y=-7.3x+39.7
Where y= number of gallons of water
and x= number of minutes
Put value of y=17.8 gallons and solving for x.
17.8=-7.3x+39.7
Subtract 39.7 from both sides
-21.9=-7.3x
Divide both sides by -7.3
3=x
or
x=3 minutes
After 3 minutes the water in the tub will be 17.8 gallons.
Answer: 3 minutes
first option 4/13
Keeping in mind a deck has 4 each of these cards...
4×4=16
16/52
4/13
So if you look at the equation you can see the y-intercept.
slope y-intercept
↓ ↓
y = x - 2
The y-intercept is where the line crosses the y-axis. So which ever graph has -2 as the y-intercept in correct...Its more complex when the graphs have the same intercept but in this case this should be easy to find.
So looking at the graphs you can see that the 3rd graph is the correct answer.
I hope this helps love! :)
