All categories

3 years ago

What is 9 to the -2 power

Mathematics

1 answer:

Rina8888 [55]3 years ago

4 0

9 to the 2 power is 81, so 9 to the -2 power is 1/81.

You might be interested in

40% of what number is 82

dezoksy [38]

It is 32.8 I just did %in my class today

6 0

3 years ago

A number increased by 25% becomes 30 the number is

Masteriza [31]

Answer:

Step-by-step explanation:

Let 'x' be the number

x +25% of x = 30

x + 0.25x = 30

1.25x = 30

x = 30/1.25

x = 24

6 0

3 years ago

Express the first quantity as a percentage of the second. <br>1 h 3 min, 3 h 30min.

KatRina [158]

Answer:

30%

Step-by-step explanation:

first we require both quantities to have the same units

converting both to minutes

1 h 3 min = 60 + 3 = 63 min

3h 30 min = (3 × 60) + 30 = 180 + 30 = 210 min

then express as a fraction and multiply by 100% to express as a percentage

$\frac{63}{210}$ × 100%

= 0.3 × 100%

= 30%

8 0

1 year ago

What is 87+56-78=?? if u know the answer plz give it to me right <br> k

PilotLPTM [1.2K]

It equals to 65 for the exact answer

4 0

2 years ago

Read 2 more answers

Simplify to an expression of the form (a sin(θ)).<br> 2sin(/8)2cos(/8)

rjkz [21]

Answer:

Your expression equals $2 \sin(\frac{\pi}{4})$ assuming the problem was to simplify $2\sin(\frac{\pi}{8}) 2\cos(\frac{\pi}{8})$ to the form $a\sin(\theta)$ .

Step-by-step explanation:

$2\sin(\frac{\pi}{8}) 2\cos(\frac{\pi}{8})$

$2(2)\sin(\frac{\pi}{8})\cos(\frac{\pi}{8})$

Let's use the following identity: $2\sin(A)\cos(A)=\sin(2A)$

$2\sin(2 \cdot \frac{\pi}{8})$

$2 \sin(\frac{\pi}{4})$ which is comparable to the form $a\sin(\theta)$ .

$a=2$

$\theta=\frac{\pi}{4}$

5 0

2 years ago