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Valentin [98]
3 years ago
12

(b) if the length, width, and height are increasing at a rate of 0.1 ft/sec, 0.2 ft/sec, and 0.5 ft/sec respectively, find the r

ate at which the surface area of the box is changing when x = 20 ft, y = 15 ft, and z = 25 ft.
Mathematics
2 answers:
abruzzese [7]3 years ago
7 0
Whhhhhhaaaaaaaaa ....................
andrey2020 [161]3 years ago
5 0

Answer:

2380 units²

Step-by-step explanation:

Thinking process:

let the length be z = 25 ft

let the breadth be  x = 20 ft

let the height be y = 15 ft

surface area  = 2 (lb) + 2 (lh) + 2 (bh)

                      = 2 (25 ×20) + 2 (25 × 15) + 2 (20*15)

                      = 1000+ 750 + 600

                      = 2350 units²

By increasing the rates by 0.1 ft/sec, 0.2 ft/sec, and 0.5 ft/sec respectively, gives 2380 units²

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hichkok12 [17]

Answer:

y = 4/6x - 4

Step-by-step explanation:

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Rise over run

Rise = +4

Run = +6

This means the slope is 4/6.

The y intercept is at -4.

Now, plug in the numbers for y = mx + b

y = 4/6x - 4

4 0
3 years ago
Help please with this question
choli [55]

Answer:

They lose about 2.79% in purchasing power.

Step-by-step explanation:

Whenever you're dealing with purchasing power and inflation, you need to carefully define what the reference is for any changes you might be talking about. Here, we take <em>purchasing power at the beginning of the year</em> as the reference. Since we don't know when the 6% year occurred relative to the year in which the saving balance was $200,000, we choose to deal primarily with percentages, rather than dollar amounts.

Each day, the account value is multiplied by (1 + 0.03/365), so at the end of the year the value is multiplied by about

... (1 +0.03/365)^365 ≈ 1.03045326

Something that had a cost of 1 at the beginning of the year will have a cost of 1.06 at the end of the year. A savings account value of 1 at the beginning of the year would purchase one whole item. At the end of the year, the value of the savings account will purchase ...

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7 0
3 years ago
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sergey [27]

Answer:

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Step-by-step explanation:

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torisob [31]

Answer:

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Step-by-step explanation:

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Setler79 [48]

Answer:

y = x - 13

Step-by-step explanation:

Given parameters:

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Unknown:

Equation of the line in slope-intercept format = ?

Solution:

The equation of a line is expressed as;

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where y and x are the coordinates

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2 years ago
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