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3 years ago

on Sunday 845 people went to zoo.on Monday 169 people went to zoo.What is the percent decrease in people visiting zoo on Monday?

Mathematics

1 answer:

Doss [256]3 years ago

6 0

( 845 - 169 ) ÷ 845 = 80%

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Sylvia placed 20 marbles in a bag: 10 red, 5 blue, green, 1 white. If

wel

The answer is 25 % hope it helps

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3 years ago

Half-life of Po-210 is 140 days. If the initial mass of the sample is 5

Anna35 [415]

Answer:

$0.625kg$

Step-by-step explanation:

we are given half-life of PO-210 and the initial mass

we want to figure out the remaining mass after 420 days

in order to solve so we can consider the half-life formula given by

$\displaystyle f(t) = a {0.5}^{t/T}$

where:

f(t) is the remaining quantity of a substance after time t has elapsed.
a is the initial quantity of this substance.
T is the half-life

since it halves every 140 days our T is 140 and t is 420. as the initial mass of the sample is 5 our a is 5

thus substitute:

$\displaystyle f(420)=5\cdot{0.5}^{420/140}$

reduce fraction:

$\displaystyle f(420)=5\cdot{0.5}^{3}$

By using calculator we acquire:

$\displaystyle f(420)=0.625$

hence, the remaining sample after 420 days is 0.625 kg

4 0

3 years ago

Please help -

USPshnik [31]

Answer: ok fine

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Find b given that p(b,2) is equidistant from a(5,4) and b(2,5)

Oksana_A [137]

Hello :
PA = PB or PA² = PB²
(5-b)²+(4-2)² = (2-b)² + (5-2)²
(5-b)²+4 = (2-b)² + 9
25 -10b +b² + 4 = 4 -4b+b² +9
-6b = -16
b = 8/3

5 0

3 years ago

A construction crew is paving a road. The crew has already paved 1,000 square feet and can pave at a rate of 300 square feet of

denis23 [38]

Answer:

1,900 square feet; f(3) represents the total number of square feet the construction crew has paved after 3 hours.

The function of the construction crew is an illustration of a linear function

The value of f(3) is 1900, and f(3) represents the total number of square feet paved after working for 3 hours

The function is given as:

To calculate f(3), we substitute 3 for x

Multiply 300 and 3

Add 900 and 1000

This means that the value of f(3) is 1900.

And it represents the total number of square feet paved after working for 3 hours

1,900 square feet; f(3) represents the total number of square feet the construction crew has paved after 3 hours.

6 0

2 years ago