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netineya [11]
3 years ago
10

The height of a rectangle is increasing at a rate of 111111 centimeters per hour and the width of the rectangle is decreasing at

a rate of 999 centimeters per hour. At a certain instant, the height is 333 centimeters and the width is 888 centimeters. What is the rate of change of the area of the rectangle at that instant (in square centimeters per hour)
Mathematics
1 answer:
Galina-37 [17]3 years ago
8 0

Answer:

Area of a rectangle = A = 295704 centimeters ^{2}

Step-by-step explanation:

Given Data:

At a certain instant,

height of a rectangle = h = 333 centimeters

width of a rectangle = w = 888 centimeters

To Find Out:

Area of a rectangle = A = ?

Formula:

Area of a rectangle = A = h × w

Solution:

Area of a rectangle = A = h × w

Area of a rectangle = A = 333 × 888

Area of a rectangle = A = 295704 centimeters ^{2}

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The distance between Anubhav’s school and his house is 45 km. He started from his house for school at 7:00 am and covered 30 km
8_murik_8 [283]

Answer:

45 km/h

Step-by-step explanation:

In the first part of the trip, he already covered 30 km so we can subtract that from the total distance

45 - 30 = 15

This means he has 15 km to go

He also took an hour, or 60 minutes, to get to school. We subtract the time spent of the first part and time spent talking to a friend from the 60 minutes

60 - 35 = 25

25 - 5 = 20

He took 20 minutes to cover the second part of the journey

Speed = distance/time

15/20 = 0.75

He covered 0.75 km per MINUTE

to find it in km/h, we just multiply the number by 60

0.75 x 60 = 45

6 0
3 years ago
Read 2 more answers
Drag each tile to the correct box. not all tiles will be used.Chris plans to mulch the border surrounding a rectangular garden i
amm1812

Length (L): 2w + 3

width (w): w

border (b): \frac{1}{4} w

Area (A) = (L + b) * (w + b)   <em>NOTE: This is assuming the width also has a border</em>

              = (2w + 3 + \frac{1}{4} w) * (w + \frac{1}{4} w)

              = (2\frac{1}{4} w + 3)(1\frac{1}{4} w)

              = (\frac{9}{4} w + 3)(\frac{5}{4} w)

              = \frac{45}{16} w^2 + \frac{15}{4}w


5 0
3 years ago
What’s the slope of the line?
Alexeev081 [22]

Answer:

4/3

Step-by-step explanation:

You use Rise over Run.

It <em>runs</em> 3 blocks to the left (+).

It <em>rises</em> 4 blocks up (+).

6 0
3 years ago
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When Vince does 14 push-ups and 12 sit-ups, it takes a total of 52 seconds. In comparison, he needs 48 seconds to do 12 push-ups
marshall27 [118]

Answer:

it takes 2 seconds to do one situp

it takes 2 seconds to do one pushup

to do 14 pushups, it takes 28 seconds.

to do 12 situps it takes 24 seconds

to do 12 pushups, it takes 24 seconds

BRAINLIEST PLEASE!

hope this helps :)

Step-by-step explanation:

14x + 12y = 52

12x + 12y = 48

^^^ this is an inequality that we can make.  

x stands for pushups

y stands for situps

if we subtract the second equation from the first, we get

2x = 4

x = 2

now we can place x in one of the equations to solve for y

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5 0
2 years ago
What is the area of a semicircle with a diameter of 10 cm?
Irina18 [472]

Answer:

<h2>39.27 cm²</h2><h2 />

Step-by-step explanation:

area of semi circle = π r² / 2

where r = 10/2 = 5 cm

area = π (5)² / 2

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7 0
3 years ago
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