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In ΔBCD, the measure of ∠D=90°, CB = 73, BD = 55, and DC = 48. What ratio represents the cosine of ∠C?

PIT_PIT [208]

Answer: 48 over 73

Explanation: I had this exact question and didint know the asnwer and after I got it wrong the test gave me the answer

4 0

3 years ago

How many grams of sodium chloride must be added to make 400. ml of a 0. 600 m sodium chloride

raketka [301]

Taking into account the definition of molarity, 14.028 grams of sodium chloride must be added to make 400 mL of a 0.600 M sodium chloride.

<h3>Definition of molarity</h3>

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

$Molarity=\frac{number of moles}{volume}$

Molarity is expressed in units $\frac{moles}{liter}$ .

<h3>Moles of sodium chloride</h3>

In this case, you know:

Molarity= 0.600 M
number of moles= ?
volume= 400 mL= 0.400 L (being 1000 mL= 1 L)

Replacing in the definition of molarity:

$0.600 M=\frac{number of moles}{0.400 L}$

Solving:

number of moles= 0.600 M× 0.400 L

number of moles= 0.24 moles

<h3>Mass of sodium chloride</h3>

Being the molar mass of sodium chloride 58.45 $\frac{g}{mole}$ , that is the amount of mass that a substance contains in one mole, the mass of sodium chloride can be calculated as:

0.24 moles×58.45 $\frac{g}{mole}$ = 14.028 grams

Finally, 14.028 grams of sodium chloride must be added to make 400 mL of a 0.600 M sodium chloride.

Learn more about molarity:

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5 0

2 years ago

This is due tonight pls help some asap

Minchanka [31]

Answer:

80%

Explanation:

20/25 is 80%

I hope this helps! :D

4 0

3 years ago

Read 2 more answers

In spinal motion restriction of the adult, which action demonstrates correct stabilization technique

nirvana33 [79]

In spinal motion restriction of the adult, to maintain the client's nose and umbilicus aligned at all times demonstrates the correct stabilization technique.

<h3>What is spinal motion restriction?</h3>

Spinal motion restriction is a strategy used to maintain spine alignment during spinal injury.

This technique is fundamental to avoiding severe spinal injury after accidents or traumatic situations.

In conclusion, in spinal motion restriction of the adult, to maintain the client's nose and umbilicus aligned at all times demonstrates the correct stabilization technique.

Learn more about spinal motion here:

brainly.com/question/20215668

#SPJ1

7 0

2 years ago

A company is considering a capital investment of $16,000 in new equipment which will improve production and increase cash flows

otez555 [7]

Based on the cost of the capital investment in the new equipment and the cash flows for the next five years, the payback period is 2.4 years.

<h3>What is the payback period?</h3>

The payback period can be found by the formula:

= Year before payback + Amount remaining to be paid / Cashflow in year of payback

The year before payback can be inferred to be the Second year because $14,000 would have come in.

The remaining amount is:

= 16,000 - 14,000

= $2,000

Payback period is:

= 2 + 2,000 / 5,000

= 2.4 years.

Find out more on the payback period at brainly.com/question/23149718.

6 0

2 years ago