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3 years ago

Evaluate cos 90°. Round your answer to the nearest hundredth if necessary

Mathematics

1 answer:

ivann1987 [24]3 years ago

5 0

Cos(90)= 0.00

It is only zero

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Will someone please help me?

Helen [10]

Answer:

Viruses are 2 times of the bacteria.

Step-by-step explanation:

Given:

Number of viruses = $2\times 10^9$

Number of bacteria = $1\times 10^9$

We have to found how many times viruses are greater than the bacteria.

To find how many times,we can divide both the numbers to compare its values.

Lets

Numerator = Number of viruses

Denominator = Number of bacteria

Dividing both we have,

⇒ $\frac{2\times 10^9}{1\times 10^9}$

⇒ $2\times 10^(^9^-^9)$ ... $\frac{ab^x}{cb^y}=\frac{ab^x^-^y}{c}$

⇒ $2\times 10^0$ ... $a^0=1$

⇒ $2$

So the viruses are 2 times of the bacteria.

7 0

2 years ago

Read 2 more answers

What is the equation for the graph below?

algol13

Answer:2nd one

Step-by-step explanation:

Y=log5(x-5)

8 0

3 years ago

Solve: x+2/x-4<0<br> O _4 O -2 -2 -4

sammy [17]

Answer:

-2<x<4

Step-by-step explanation:

For $\frac{x+2}{x-4} < 0$ , note that either the numerator or denominator is positive and the other must be negative for this inequality to be satisfied.

This means x+2>0 and x-4<0 or x+2<0 and x-4>0.

Lets look at the first scenario (x+2>0 and x-4<0)

x+2>0 and x-4<0

x>-2 and x<4

This means that -2<x<4.

Let’s look at the other scenario (x+2<0 and x-4>0)

x+2<0 and x-4>0

x<-2 and x>4

This means that x must be <-2 and >4 simualtaneously, which is impossible.

Therefore, this only occurs when -2<x<4.

I hope this helps! :)

7 0

2 years ago

Find two numbers such that the sum of their squares is 100. The square of the larger number is equal to the sum of the product o

Shtirlitz [24]

Answer with Step-by-step explanation:

Let x and y are two numbers

According to question

$x^2+y^2=100$ ....(1)

Suppose x is larger than y

$x^2=x(4y+8x)$

$x=4y+8x$

$x-8x=4y$

$-7x=4y$

$y=-\frac{7}{4}x$

Substitute the value of y

$x^2+(-\frac{7}{4}x)^2=100$

$x^2+\frac{49}{16}x^2=100$

$\frac{16x^2+49x^2}{16}=100$

$\frac{65}{16}x^2=100$

$x^2=\frac{16\times 100}{65}$

$x=\sqrt{\frac{1600}{65}}=\frac{40}{\sqrt{65}}=\frac{40}{65}\sqrt{65}=\frac{8}{13}\sqrt{65}$

$y=-\frac{7}{4}\times \frac{8}{13}\sqrt{65}=-\frac{14}{13}\sqrt{65}$

3 0

2 years ago

Write 2.3181818... as a mixed number

JulsSmile [24]

Let x= 2.3181818...

then

10x=23.181818... and

1,000x=2,318.1818...

1,000x-10x=2,318.1818...-23.181818...

990x = 2,318 - 23
990x = 2295

x=2295/990

dividing by 5 both numerator and denominator:

x= 459/198

now, x= 198 + 198+ 63

so $x= 2\frac{63}{198}$

Answer: $x= 2\frac{63}{198}$

7 0

2 years ago