Answer:
C
Step-by-step explanation:
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Set up a proportion:
The 4 foot pole casts a 5 foot shadow is written as 4/5
Let the height of the flagpole = x.
The flag pole casts a 16 foot shadow so it is written as X/16
Now set the two proportions equal to each other:
4/5 = X/16
Solve for X by cross multiplying:
5X = 64
Divide both sides by 5:
X = 64/5
X = 12.8
The flag pole is 12.8 feet tall.
The slope from a table can be found by finding what number keeps adding on new points. (horrible wording sorry)
EXAMPLE:
x y
0 2
1 4
2 6
3 8
4 10
for the X values it keeps adding by 1 and the Y values keep adding by 2. Since the slope is the change in y over x the slope would be 2/1 therefore simplifying to a slope of 2. To find the y intercept, you have to look for a value in which the X value is 0. From the table, this would be 2 so the y int is (0,2)
Answer:
1.09 moles.
Step-by-step explanation:
There is 70g of water in 140ml of solution.
This means there are 17.5g of water in 35ml of solution. (Divide by 4)
In 17.5g of water, there are 17.5/16 = 1.09 moles of water.