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2 years ago

HI help i will give brainlist to anyone who answers

Mathematics

1 answer:

kifflom [539]2 years ago

4 0

Answer: 4

Step-by-step explanation:

Formula:

logb(x) = y, if by = x

Input:

x = 256

b = 4

Solution:

y = log4 256

= log4 44

= 4 log4 4 = 4 x 1

log4 256 = 4

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urgent!!!! house has 30 windows. kids playing outside the house 40% of the windows. how many windows are broken?

svetlana [45]

Answer:

12 windows

Step-by-step explanation:

Number of windows broken = 40% of 30

$= \frac{40}{100}*30\\\\= 4 * 3\\\\= 12$

3 0

2 years ago

Two equal ratios are called a

Shtirlitz [24]

I think 2 equal ratios are called a <u>proportion</u>

6 0

3 years ago

Read 2 more answers

BRAINLIEST ASAP! PLEASE HELP ME :)

Irina-Kira [14]

Answer:

○ $\displaystyle 25\%$

Step-by-step explanation:

3 → 13 − 16

$\displaystyle \frac{Number\:of\:desired\:[favourable]\:outcomes}{Total\:number\:of\:possible\:outcomes} \\ \\ \frac{3}{12} = \frac{1}{4} = 25\%$

I am joyous to assist you anytime.

4 0

3 years ago

Six yards of rope costs $5.50 while four yards costs $4.75

Amiraneli [1.4K]

The best option is the first one (Six yards of rope costs $5.50). It is the lowest unit cost.

<u>Step-by-step explanation:</u>

For the given question case, first we should compare the unit costs of the choices provided and evaluate the best option.

Choice 1:

Six yards of rope costs $ 5.50

$\frac{5.50 \text { dollar}}{6 \text { yard }}=0.9167\ dollar/yard$

Choice 2:

Four yards costs $ 4.75

$\frac{4.75 \text { dollar}}{4 \text { yard }}=1.1875\ dollar/yard$

Thus, the best choice is the first one. Because it is the lowest unit cost.

3 0

2 years ago

A golfer keeps track of his score for playing nine holes of golf (half a normal golf round). His mean score is 8080 with a sta

solniwko [45]

Answer:

Therefore the mean and standard deviation of his total score if he plays a full 18 holes are 160 and $11\sqrt2$ respectively.

Step-by-step explanation:

Given that,

For the first 9 holes X:

E(X) = 80

SD(X)=13

For the second 9 holes Y:

E(Y) = 80

SD(Y)=13

For the sum W=X+Y, the following properties holds for means , variance and standard deviation :

E(W)=E(X)+E(Y)

and

V(W)=V(X)+V(Y)

⇒SD²(W)=SD²(X)+SD²(Y) [ Variance = (standard deviation)²]

$\Rightarrow SD(W)=\sqrt{SD^2(X)+SD^2(Y)}$

∴E(W)=E(X)+E(Y) = 80 +80=160

and

∴ $SD(W)=\sqrt{SD^2(X)+SD^2(Y)}$

$=\sqrt{11^2+11^2}$

$=\sqrt{2.11^2}$

$=11\sqrt2$

Therefore the mean and standard deviation of his total score if he plays a full 18 holes are 160 and $11\sqrt2$ respectively.

4 0

3 years ago