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3 years ago

Someone please help me solve this 40=250(0.89)^x

Mathematics

1 answer:

Hoochie [10]3 years ago

5 0

Answer: 15.72575

Step-by-step explanation:

Divide 250 over:

40/250=(0.89)^x

Log both sides (easiest with graphing calculator)

Remember exponent comes down in front on a log

Log(0.16) = x log (0.89)

X= Log (.16) / log (0.89)

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Plz help me I don’t understand this

Firlakuza [10]

The answer should be 31/10

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3 years ago

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What is the slope of line a? <br><br>

emmainna [20.7K]

<h3>Answer: -1/4 (choice C)</h3>

========================================================

Explanation:

Start at the point (0,1). This is the y intercept, which is where the graph crosses the y axis.

Then move down 1 and over to the right 4 spaces. We arrive at (4,0) which is the x intercept.

The process of "down 1, over to the right 4" can be thought of like this

rise/run = -1/4

rise = -1

run = 4

A rise of -1 indicates we go down 1 unit

The run of 4 means we move to the right 4 units

So that's why slope = rise/run = -1/4

-------------------------------------------------------

Here's another approach using the slope formula:

m = (y2-y1)/(x2-x1)

m = (0-1)/(4-0)

m = -1/4

I used the two points (0,1) and (4,0) as (x1,y1) and (x2,y2) respectively. This formula basically says "subtract the y coordinates, subtract the x coordinates in the same order, then divide the differences y over x".

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Side note: The line moving downhill, as we read from left to right, indicates a negative slope.

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2 years ago

The product of two rational numbers is 2/5 , if one of them is -8/25, find the other.

Sergio [31]

Answer:

x=-5/4

Step-by-step explanation:

Let the number be x and y

x.y=2/5 (The product of two rational numbers is 2/5)

if one of the number is -8/25

x.(-8/25)=2/5

(Here Substituted the value of one of the number yoy may substitute the value -8/25 in place of x

x=(2/5) *(-25/8)

x=-5/4

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2 years ago

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PLEASE HELP ME! THE QUESTION IS DOWN BELOW IN THE PICTURE

maria [59]

5 = log(0.9) 0.59045

exponential form:

(0.9)^5 = 0.59045

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3 years ago

ronaldo delivers the papers at the rate of 6 papers in 24 minutes. how much longer would it take him to deliver 56 papers than 4

UkoKoshka [18]

We are given

Ronaldo delivers the papers at the rate of 6 papers in 24 minutes

so, number of papers =6 in time =24 minutes

so, firstly we can find rate

rate = ( number of papers)/( time taken)

$r=\frac{6}{24} =\frac{1}{4}$

now, we can find times

Time for 56 papers:

we are given

number of papers =56

rate is

$r=\frac{1}{4}$

now, we can find time

$t_1=\frac{56}{r}$

$t_1=\frac{56}{\frac{1}{4}}$

$t_1=224min$

Time for 41 papers:

we are given

number of papers =41

rate is

$r=\frac{1}{4}$

now, we can find time

$t_2=\frac{41}{r}$

$t_2=\frac{41}{\frac{1}{4}}$

$t_2=164min$

now, we can find time difference

$t=t_1-t_2$

so, we can plug values

$t=224-164$

$t=60 min$ ..............Answer

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3 years ago

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