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3 years ago

Find the area of the surface. the part of the surface z = xy that lies within the cylinder x2 + y2 = 81

Mathematics

1 answer:

Anika [276]3 years ago

4 0

Ans: The area of the surface is: 1553.081

Explanation: Please see the image attached with this answer (find attachment).

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Kareem cannot decide which of two washing machines to buy. The seling price of

Phantasy [73]

The first washing machine is 50% off- so it'd be $260 for the final price

The second washing machine was marked down by 20%, so it'd be 416. But then it was marked down another 30% so the final price would be $291

Since the first washing machine was just 50% of $520, it's a better deal rather than 20% of $520, then 30% of $416

I hope my answer was clear enough!

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Which conversion requires multiplication?

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2 years ago

A student ran the 50 yard dash in 5.8 seconds at what speed did the student run in miles per hour round to the nearest 10th

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The answer is 17.6 miles per hour

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3 years ago

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Y=3/8x−4 write in standard form

Naddik [55]

Answer:

y=3/8x-4
Move the expression to the left
y-3/8x=-4
Multiply both sides by 8
8y-3x=-32
Reorder the terms
-3x+8y=-32
Change the signs and standard form is...
3x-8y=32

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3 years ago

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Terry is skiing down a steep hill. Terry's elevation, E(t), in feet after t seconds is given by E(t)=2600−50t.

lesya692 [45]

Answer:

Part 1) The equation tells us that Terry started at an elevation of 2,600 ft

Part 2) The elevation is decreasing by 50 feet each second

Step-by-step explanation:

we have

$E(t)=2,600-50t$

where

E(t) is Terry's elevation in feet

t is the time in seconds

Part 1) Find the E intercept of the equation

The E-intercept is the value of E when the value of t is equal to zero

For t=0

substitute

$E(0)=2,600-50(0)$

$E(0)=2,600\ ft$

therefore

The equation tells us that Terry started at an elevation of 2,600 ft

Part 2) Find the slope of the equation

we have

$E(t)=2,600-50t$

This is the equation of the line into slope intercept form

The slope m is equal to

$m=-50\ ft/sec$

The slope is negative, because is decreasing

therefore

The elevation is decreasing by 50 feet each second

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3 years ago