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3 years ago

The perimeter of a rectangle is 34 units. Its width is 6.5, point

Mathematics

1 answer:

Sliva [168]3 years ago

6 0

Answer:

Length = 10.5units,Area = 68.25 unit²

Step-by-step explanation:

Perimeter =34 units

Width =6.5 units

Perimeter = l+l+w+w

Where l= length and w= width

34 = l + l + 6.5+ 6.5

34.= 2l + 13

Subtract 13 from both sides

2l = 34 - 13

2l = 21

Divide both sides by 2

L= 21/2

Length = 10.5units

If we are to find the area.

Area = length x width

Area = 10.5 × 6.5

Area = 68.25 unit²

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Answer:

5≥6

Step-by-step explanation:

13−8≥+6

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3 years ago

A student said that 3:4 is equivalent to 9:16 and 18:64. What did the students do wrong?

goldenfox [79]

Answer: The students did not do anything wrong, they were right

Step-by-step explanation:

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3 years ago

what is (5.91 x 10^-3) - (8.7 x 10^10) written in a scientific notation? Please answer asap thank you :))

nata0808 [166]

Answer:

Please check the explanation.

Step-by-step explanation:

Given the expression

$\left(5.91\times \:10^{-3}\right)-\left(8.7\times \:10^{10}\right)$

$\mathrm{Remove\:parentheses}:\quad \left(a\right)=a$

$=5.91\times \:10^{-3}-8.7\times \:10^{10}$

$5.91\times \:10^{-3}$

$\mathrm{Apply\:exponent\:rule}:\quad \:a^{-b}=\frac{1}{a^b}$

$=5.91\times \frac{1}{10^3}$

$=\frac{5.91}{1000}$

$=0.00591$

similarly

$8.7\times \:10^{10}$

Convert element to a decimal form

$10^{10}=10000000000$

$=10000000000\times \:8.7$

$\mathrm{Multiply\:the\:numbers:}\:8.7\times \:10000000000=87000000000$

$=87000000000$

Thus, the expression becomes

$\left(5.91\times \:\:10^{-3}\right)-\left(8.7\times \:\:10^{10}\right)=5.91\times \:\:10^{-3}-8.7\times \:\:10^{10}$

$=0.00591-87000000000$

$=-86999999999.9941$

Hence,

converting -86999999999.9941 in a scientific notation

In order to make our job easier we will remove the sign "-" from number -86999999999.9941 (we will write "-" at the final solution). So after this step we have:

−86999999999.9941 ⟶ 86999999999.9941

In order to write number 86999999999.9941 in scientific notation, we need to move the decimal point from its current location (black dot) to the new position such as:

8.6999999999.9941

So, we need to move the decimal point 10 places to the right.

This means that the power of 10 will be positive 10.

Now we have that the

Number part = 8.69999999999941 and

Exponent part = 10

Thus, we conclude that:

−86999999999.9941 = − 8.69999999999941 × 10¹⁰

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4 years ago

Find the maximum and minimum values of the function g(θ) 5θ-9sin(θ) on the interval [0, π] Minimum value =

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Answer:

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Step-by-step explanation:

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2 years ago

which items of information are necessary to calculate the mass percent of an element in a given compound? select all that apply.

solmaris [256]

The mass percent of an element in a compound can be calculated by knowing specific items of information

The items of information necessary are;

The molar mass of the element, $MM_{element }$

The count of the number of moles of the element in the compound, n

The compound's formula

The compound's molar mass

Reasons:

The mass percent of an element in a compound is given as follows;

$Mass \ percent \ of \ element \ in \ a \ compound = \dfrac{MM_{element } \times n}{MM_{compound}} \times 100$

Where;

$MM_{element }$ = Molar mass of the element

$MM_{compound}$ = Molar mass of the compound

n = The number of moles of the element in the compound

Therefore, the items of information necessary to calculate the mass percent in a given compound are;

The molar mass of the element, $MM_{element }$

$MM_{element }$ , gives the mass per unit of the element in the compound

The count of the number of moles of the element in the compound, n

The number of moles of the element per mole of the compound gives the number by which the molar mass is multiplied, to get the mass of the element in the compound

The compound's formula

The formula of the compound is the source of information of the number of moles of the element present in a mole of the compound

The compound's molar mass

The molar mass of the compound is the mass to which the mass of the element in a mole of the compound is a fraction. That is the mass that divides the mass of the element in the calculation of the mass percent of the element

With the above information about the element in the compound, its mass percent can be calculated

Learn more here:

brainly.com/question/13648441

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3 years ago