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2 years ago

It took Khalid 90 minutes to complete 40 tasks. Which answer choice is an equivalent rate?

Mathematics

2 answers:

miv72 [106K]2 years ago

4 0

Answer:

Step-by-step explanation:

90/40 is 2.25, so each task takes 2.25 minutes. Therefore, 10 tasks takes 22.5 minutes.

Kruka [31]2 years ago

3 0

Answer:

10 tasks in 22.5 minutes

Step-by-step explanation:

90/40

= 2.25 tasks/minute

22.5/10

= 2.25 tasks/minute

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Find the surface area of the regular pyramid shown in the accompanying diagram. If necessary, express your answer in simplest ra

Oksana_A [137]

Answer:

The area of the pyramid is 360 unit²

Step-by-step explanation:

Given

Base Edge, a = 10

Height, h = 12

Required

Determine the surface area

The surface area of a regular pyramid is calculated as thus;

$A = a^2 + 2a\sqrt{\frac{a^2}{4} + h^2}$

Substitute values for a and h

$A = 10^2 + 2 * 10 * \sqrt{\frac{10^2}{4} + 12^2}$

Evaluate all squares

$A = 100 + 2 * 10 * \sqrt{\frac{100}{4} + 144}$

$A = 100 + 2 * 10 * \sqrt{25 + 144}$

$A = 100 + 2 * 10 * \sqrt{169}$

Take positive square root of 169

$A = 100 + 2 * 10 * 13$

$A = 100 + 260$

$A = 360$

<em>Hence, the area of the pyramid is 360 unit²</em>

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1 year ago

Karl and his dad are building a playhouse for karl's younger sister. the floor of the playhouse will be a rectangle that is 6 by

expeople1 [14]

Area of a rectangle:
$l \times w$
Area of playhouse"
$6 \times 8 \frac{1}{2} \\ = 51 {ft}^{2}$

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1 year ago

The equation y = negative StartFraction 1 Over 20 EndFraction x + 10 represents the gallons of gasoline that remain in Michelle’

Andrej [43]

Answer:

y= -intercept = 10

Step-by-step explanation:

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2 years ago

Jessie spent $10 on 3 hair accessories. Which point represents this relationship? On a coordinate plane, a graph titled Jessie's

AlladinOne [14]

Answer:

A. (3, 10)

Step-by-step explanation:

You are told that ...

(x, y) = (number of accessories, dollars)

and you are told that ...

number of accessories = 3

dollars = 10

so the ordered pair is ...

(x, y) = (3, 10) . . . . Point A

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1 year ago

Read 2 more answers

It has been estimated that only about 30% of California residents have adequate earthquake supplies. Suppose we are interested i

lidiya [134]

Answer:

Step-by-step explanation:

We are given that 30% of California residents have adequate earthquake supplies.

a) Ramon variable X denotes the number of the california residents that have adequate earthquake insurance

B) x can take value 1 ,2 ,3 ......

C)The distribution of random variable is geometric distribution with parameter p=0.3

The pmf of geometric distribution is

$P(X=x)=0.3(1-0.3)^{x-1} , x=1,2,3...$

D)P(X=1) or P(X=2)=P(X=1)+P(X=2)

P(X=1) or P(X=2)= $0.3(1-0.3)^{1-1}+0.3(1-0.3)^{2-1}=0.51$

$P(X \geq 3)=1-P(X$

$E(X)=\frac{1}{p}$

p is the resident who does not have adequate earthquake supplies.

p = 1-0.3 = 0.7

$E(X)=\frac{1}{0.7}=1.42$

G) $E(X)=\frac{1}{q}=\frac{1}{0.3}=3.33$

8 0

2 years ago