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sergeinik [125]
3 years ago
6

I neeed heeeelpp im not sure wich one it is

Mathematics
1 answer:
dolphi86 [110]3 years ago
7 0
A) because the decimal is repeating, 625.49 is irrational.
B) because 625.89 can be written as the ratio of two integers, 62589 and 100000, this is a rational number.
C) sqrt(90) can be factored:  sqrt(9)*sqrt(10).  sqrt(9) = 3 (rational), but sqrt(10) is irrational.  Thus sqrt(90) is irrational.
D)  You try this one yourself, OK?
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Kalin walks at a steady rate of 1.1 miles per hour. The beach is 4 miles from his
Vesna [10]

Answer:

It would take him 4 hrs

Step-by-step explanation:

and 40 or 4 mins

6 0
3 years ago
How to find common difference of arithmetic sequence given first and last term?
scoundrel [369]
Yeah there is a way... Lemme give a typical question...
Find the common difference of an arithmetic progression whose first term Is 1 and last term is 1023...

First term = T¹ =a
Last term = Tn = a + (n-1)d

Since your given the values of the first and the last term... You can substitute

Tn = 1 + (1023-1)d

1023 = 1 + 1022d

1022d = 1023 - 1

1022d = 1022

common difference = 1...

So there is a way....

You can get the common difference using the two terms given...

Hope this helped...

8 0
3 years ago
The following function describes the number of employees working at a company, In thousands, where trepresents the number of yea
NISA [10]

Consider the missing part of the question is "Select the correct statement.

A. The number of employees is increasing by 50% every year.

B. The number of employees is decreasing by 10% every year.

C. The number of employees is decreasing by 90% every year.

D. The number of employees is increasing by 90% every year."

Given:

The function is:

f(t)=1.5(0.90)^t

Where, f(t) is the number of employees working at a company, in thousands and t is the number of years since the company revised the benefits package.

To find:

The correct statement from the given options.

Solution:

The general exponential decay model is:

f(t)=a(1-r)^t         ...(i)

Where, a is the initial value, r is the rate of decay and t is the number of years.

We have,

f(t)=1.5(0.90)^t

It can be written as

f(t)=1.5(1-0.10)^t        ...(ii)

From (i) and (ii), we get

a=1.5,r=0.10

The initial value is 1.5 and the rate of decay is 0.10 or 10%. It means the number of employees is decreasing by 10% every year.

Therefore, the correct option is B.

5 0
3 years ago
Answers matching "The combined average weight of an okapi and a llama is 450 kilograms. The average weight of 3 llamas is 190 ki
kirill [66]

Let us say that:

x = weight of llamas

y = weight of okapi

 

From the problem, we can create the equations:

x + y = 450           --> 1

3 x = y + 190        --> 2

 

Rewriting equation 1:

x = 450 – y

 

From equation 2:

3 (450 – y) = y + 190

1350 – 3 y = y + 190

4 y = 1160

y = 290

 

From equation 1:

x = 450 – 290

x = 160

 

Therefore a llama weighs 160 kilograms while okapi weigh 290 kilograms on average.

5 0
4 years ago
In one city, there are four straight streets that form a square block. The length of each side of the block is 154 m. Find the p
Hunter-Best [27]

Answer:

Step-by-step explanation:

i) the length of each side of the block is 154m.

ii) the block is a square block

iii) so the perimeter of the square block will be = 4 × length of one side.

iv) Therefore the perimeter of the square block is = 4 × 154 m = 616 m.

6 0
3 years ago
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