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Verizon [17]
3 years ago
8

The price of an item yesterday was $140. Today, the price fell to $63. Find the percentage decrease.

Mathematics
2 answers:
tankabanditka [31]3 years ago
5 0

Answer: 55% decrease

Step-by-step explanation:

% decrease is calculated by = [ (New Value - Old Value) / Old Value × 100

63 - 140 = -77

-77/140 = -0.55

- 0.55 x 100

= -55%

Anna35 [415]3 years ago
4 0

Answer:

55% decrease

Step-by-step explanation:

To find the percent decrease

Take the original price and subtract the new price

140-63 =77

Divide by the original price

77/140

.55

Multiply by 100 to get the percent

.55*100 = 55%

55% decrease since the price got lower

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The sets E and A are given below.
xxTIMURxx [149]

Intersection of E and A: E n A = { 8 }

Union of E and A : E U A = { -2, 3, 0, 6 , 8 }

<em><u>Solution:</u></em>

<em><u>The sets E and A are given below:</u></em>

E = { -2, 3, 8 }

A = { 0, 6 , 8 }

<em><u>Find the intersection of E and A</u></em>

Intersection of E and A means that, set containing all elements of E that also belong to A

Therefore,

From sets E and A,

E n A = { 8 }

<em><u>Find the union of E and A</u></em>

union of E and A contains all elements of set E and set A

E U A = { -2, 3, 0, 6 , 8 }

4 0
3 years ago
The demand function for q units of a product at $p per unit is given by p(q + 3)2 = 100,000. Find the rate of change of quantity
wariber [46]

Answer:

-0.625 unit

Step-by-step explanation:

Given that:

p(q+3)^2 = 100, 000

where;

p = price

q = quantity

To find the rate of change of quantity (q) with respect to price (p) we go by the differentiation

(q+3)^2\frac{dp}{dp} +p^2(q+3)\frac{dq}{dp}=0

(q+3)^2 +p^2(q+3)\frac{dq}{dp}=0

\frac{dq}{dp}=\frac{-(q+3)}{2p}

when P =40

Then 4(q+3)² = 100, 000

(q+3)² = \frac{100,000}{4}

(q+3)² = 25,000

(q+3) = \sqrt{2500}

q+ 3 = 50

q = 50 -3

q = 47

NOW; \frac{dq}{dp}=\frac{-(q+3)}{2p}

\frac{dq}{dp}=\frac{-(47+3)}{2*40}

\frac{dq}{dp}=\frac{-47-3}{2*40}

\frac{dq}{dp}=\frac{-50}{80}

\frac{dq}{dp}=-0.625

Thus, the rate of change of quantity with respect to price when p = $40 is -0.625 unit.

8 0
4 years ago
-9+t=12 will award brainliest
Vinvika [58]

Answer:

t=21

Step-by-step explanation:

5 0
3 years ago
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Can some help plzz I am stuck on this math problem!!
slega [8]

Answer:

60 points in 5 games

Step-by-step explanation:

plug the numbers of points scored into the top boxes,  so the boxes should look like  ( [8]+[11]+[12]+[16]+[n] ) then plug in the number of games he played in the bottom box     [5]                   so 8+11+12+16+n all divided by 5 has to = 12

5x12 = 60  

n= 60-8-11-12-16     n= 13

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3 years ago
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The answer to this question is D
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