Sumi rides at a constant speed of 10 ft/s. Write an equation that expresses the distance d that sumi has traveled as a function
1 answer:
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Answer:
<u>It</u><u> </u><u>is</u><u> </u><u>3</u><u>y</u><u> </u><u>=</u><u> </u><u>4</u><u>x</u><u> </u><u>+</u><u> </u><u>1</u><u>0</u>
Step-by-step explanation:
Let's first get the slope of the curve.
[ slope is the derivative of the equation ]
introduce dy/dx :
make dy/dx the subject:
At point (-1, 2):
but a tangent has the same slope as the curve:
m is the slope
c is the y-intercept
At (-1, 2):
equation:
To find out the length of the third segments of the triangle, we can use this formula.
The, third length is very close to the 4. thus, the option (E) is correct.
Answer:
$120.14
Step-by-step explanation:
This question is an example of a compound percentage decrease.
To work this out you would first need to convert the percentage of 25 into a decimal. You can do this by dividing the percentage of 25 by 100, this gives you 0.25. This is because percentages are out of 100.
The next step is to minus 0.25 from 1, this gives you 0.75. This is because we are working out the percentage decrease.
The final step is to multiply the amount of 900 by 0.75 to the power of 7, this gives you $120.14.
1) Divide 25 by 100.
2) Minus 0.25 from 1.
3) Multiply 900 by 0.75 to the power of 7.