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4 years ago

What is the principal square root of -4

Mathematics

1 answer:

devlian [24]4 years ago

6 0

Answer:

The principal square root of -4 is 2i.

Step-by-step explanation:

$\sqrt{-4}$ = 2i

We have the following steps to get the answer:

Applying radical rule $\sqrt{-a} =\sqrt{-1} \sqrt{a}$

We get $\sqrt{-4} =\sqrt{-1} \sqrt{4}$

As per imaginary rule we know that $\sqrt{-1}=i$

= $\sqrt{4} i$

Now $\sqrt{4} =2$

Hence, the answer is 2i.

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At a local grocery store, Martha buys 12 cans of tomato sauce. If each can costs two dollars, and the store is giving a three do

klasskru [66]

12 x 2 = (24 - 3) = 21

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3 years ago

Dana buys dress shirts from a clothing manufacturer for s dollars each, and then sells the dress shirts in her retail clothing s

nydimaria [60]

Answer:

Consider the complete question is,

Dana buys dress shirts from a clothing manufacturer for s dollars each, and then sells the dress in her retail clothing store at a 35% markup

a. Write the markup as a decimal

b. write an expression for the retail price

c. What is the retail price of a dress shirt that Dana purchased for 32.00

d. How much was added to the original price of the dress shirt?

Reference : brainly.com/question/2202598

Solution :

Here, s represents the price of each dress shirt,

a. Since, markup percentage = 35%,

Thus, the markup in each shirt = 35% of price of each dress shirt

= 35% of s

$=\frac{35s}{100}$

= 0.35s

b. Retail price = original price + markup

= s + 0.35s

= 1.35s

c. if s = 32,

Retail price = 1.35(32) = 43.2

d. The added amount in original price = Retail price - original price

= 43.2 - 32

= 11.2

5 0

4 years ago

What is the solution to the equation 4

azamat

Answer:

Step-by-step explanation:

8 0

4 years ago

Read 2 more answers

Jake's teacher had 6 calculators for 28 students to use. If the first students to use the calculators are chosen at random, what

marta [7]

Answer:

$\dfrac{3}{14}$ or 21.45%

Step-by-step explanation:

To find the probability that Jake will get a calculator, we simply divide the number of calculators to the number of students in the class.

Probability = $\dfrac{6}{28}$

Probability = $\dfrac{3}{14}$

To find the probability in percentage form, we simply multiply the quotient of $\dfrac{3}{14}$ by 100

$\dfrac{3}{14} =0.2142$

0.2142 x 100 = 21.42%

So Jack has a 21.45% chance of getting a calculator from the teacher.

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4 years ago

If you have 24 square pieces of wood, describe all the different ways you could make a rectangle by placing them side by side

Ronch [10]

You have 24 square pieces of wood. You could lay them out in the following fashion. First number is the number of rows. Second number is the number of columns. For example:

1,24 is 1 row by 24 columns. Here goes:

1,24

2,12

3,8

4,6

6,4

8,3

12,2

24,1

i believe that's all.

<span>It winds up being the number of ways you can multiply two integers to get 24. </span>

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3 years ago