3 years ago

Let “a” represent Andrew’s age TODAY. Write an expression to represent the situation. Andrew’s age in 4 years.

1 answer:

7 0

Answer: 4a

Explanation If ‘a’ represents his age today, and you have to find his age in four years you take 4 multiplied a. (4 x a) putting it together and you would get 4a

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Find arc DC pls I’m stuck on this problem

stepan [7]

Answer:

$m\overset{\Large\frown}{ABC} \: = \: 196°$

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3 years ago

A pond has 150 fish and the population decreases by 8% each day. How many days before there are 30 fish

nlexa [21]

Answer:

19 days

Step-by-step explanation:

Given

$a = 150$ --- initial

$r = 8\%$ -- rate

Required

Days when the fish gets to 30

The function is exponential and as such it follows;

$y = ab^x$

Where x represents the number of days and y the number of fishes

Because the fishes decreases;

$b = 1 - r$

So, we have:

$b = 1 - 8\%$

Express as decimal

$b = 1 - 0.08$

$b = 0.92$

In $y = ab^x$

$a =150$

$y = 30$

$b = 0.92$

So, we have:

$30 = 150 * 0.92^x$

Divide both sides by 150

$0.2 = 0.92^x$

Take log of both sides

$log(0.2) = log(0.92^x)$

Apply law of logarithm

$log(0.2) = x\ log(0.92)$

Make x the subject

$x = \frac{log(0.2)}{log(0.92)}$

$x = \frac{-0.6990}{-0.0362}$

$x = 19.309$

$x \approx 19$

<em>Hence, it takes approximately 19 days</em>

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3 years ago

The tire of a car has a radius of 10.5 inches. How many rotations does the tire need to make five for the car to travel 3,297 in

yan [13]

It would be 314 because 3297/10.5 = 314

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3 years ago

One million three hund forty five thousand eight hundred and twenty in expanded form

vesna_86 [32]

1000000 + 300,000 + 40,000 + 5,000 + 800 + 20

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4 years ago

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What is the value of x in the equation below?<br><br> 7x + 8 = -13

ivann1987 [24]

Answer:

x=-3

Step-by-step explanation:

7x=-13-8

7x=--21

x=-21/7

x=-3

points or brainleist please

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3 years ago

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