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3 years ago

Help I have no clue please I just don't get it

Mathematics

2 answers:

ivolga24 [154]3 years ago

7 0

Just do 30 divided by 7 and put 7 as the denominator on top of the remainder

Korolek [52]3 years ago

6 0

Divide the numerator by the denominator. So that would be 30/7 = 4 ( but you still have 2 as a remainder) now whatever is left write as a fraction so the answer to your question is 4 2/7.
Hope that helps :)

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Radioactive iodine treatment is so successful at treating hyperthyroidism that it has virtually replaced thyroid surgery. To the

vagabundo [1.1K]

Answer:

56 days

Explanation:

$\sf Half \ Life : A = A_O \ x \ (\dfrac{1}{2} )^{\dfrac{t}{h} }$

where A is final amount, Ao is initial amount, t is time taken, h is half life

Here given:

initial amount: 400 millicuries

final amount: 3.125 millicuries

half life: 8 days

time taken: ?

Hence solve for time taken:

$\sf \rightarrow A = A_O \ x \ (\dfrac{1}{2} )^{\dfrac{t}{h} }$

insert values given

$\sf \rightarrow 3.125 = 400 \ x \ (\dfrac{1}{2} )^{\dfrac{t}{8} }$

divide both sides by 400

$\sf \rightarrow (\dfrac{1}{2})^{\dfrac{t}{8}}=0.0078125$

apply exponent rule

$\sf \rightarrow {\dfrac{t}{8}}=\dfrac{ln(0.0078125)}{ln(1/2)}$

simplify

$\rightarrow \sf \dfrac{t}{8}=7$

multiply both sides by 8

$\rightarrow \sf t = 56$

4 0

2 years ago

32.8519 rounded to the nest hundredth

Katena32 [7]

Answer:

32.85 is that rounded to the nearest hundredth

4 0

3 years ago

Read 2 more answers

Write the equation of the axis of symmetry for f(x)=-x^2+4x-3

Rudik [331]

Answer:

x= -10

Step-by-step explanation:

7 0

2 years ago

A right triangle with integer sides has area equal to 30. What is the length of its hypotenuse.

kozerog [31]

We have been given that a right triangle with integer sides has area equal to 30. We are asked to find the length of hypotenuse of right triangle.

We know that area of triangle is half the product of its base length and height.

Since our given triangle is a right triangle, so its base and height will be legs of right triangle.

$\frac{1}{2}\cdot\text{Base}\times \text{Height}=\text{Area}$

$\frac{1}{2}\cdot\text{Base}\times \text{Height}=30$

$\frac{1}{2}\cdot 2\cdot\text{Base}\times \text{Height}=30\cdot 2$

$\text{Base}\times \text{Height}=60$

This means that product of two bases is 60.

Now we need to find two multiples of 60 such that they are make a right triangle.

Multiples of 60:

1, 60

2, 30

3, 20

4, 15

5, 12

6, 10

We know that (5, 12 and 13) is a Pythagoras triplet.

$5^2+12^2=13^2$

$25+144=169$

$169=169$

Therefore, the hypotenuse of right triangle is 13 units.

8 0

3 years ago

What is the equation of the line is perpendicular to the given line and passes through the point (3,4)?

kolbaska11 [484]

Answer:

y = 3x-5

Step-by-step explanation:

The slope of the line on the graph is -1/3. Perpendicular lines have slopes which are negative reciprocals of each other. This makes the slope of the new line 3.

Substitute the values m=3 and the point (3,4) into point slope form and simplify.

y - 4 = 3(x - 3)

y - 4 = 3x - 9

y = 3x -9 + 4

y = 3x - 5

6 0

3 years ago