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viktelen [127]
3 years ago
15

One astronomical unit is about 93,000,000 miles. At 20,000 miles per hour how many astronomical units can Orion travel? ( Orion

is a spacecraft that reached speeds of 20,000 miles per hour)
Mathematics
1 answer:
uranmaximum [27]3 years ago
4 0

Answer:

2.15\times 10^{-4}\ AU

Step-by-step explanation:

Given that:-

The speed of the orion= 20,000 miles per hour

Time = 1 hour ( From source )

Thus,

Distance = Speed * Time = 20,000*1 miles = 20,000 miles

Thus, in 1 hour, the orion can travel 20,000 miles

Also,

93,000,000 miles = 1 astronomical unit

1 mile = 1/93,000,000 astronomical unit

20,000 miles = (1/93,000,000)*20,000 astronomical unit

<u>The orion can travel 2.15\times 10^{-4} AU in one hour.</u>

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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} }

<u>insert values given</u>

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

<u>divide both sides by 400</u>

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

<u>apply exponent rule</u>

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

<u>simplify</u>

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

<u>multiply both sides by 8</u>

\rightarrow \sf t = 56

4 0
2 years ago
Solve 4(2a-1) = -10(a-5)
densk [106]
Firstly, you've got to expand the brackets, this becomes;
8a-4= -10a+ 50
You've then got to eliminate the -10a and you do this by adding 10a to both sides,
This then becomes 18a-4=50
You've then got to add 4, to eliminate this, which then becomes 18a=54
You've then got to divide both sides by 18, and this becomes 3.
Therefor, a=3
Hope this helps :)
4 0
3 years ago
Read 2 more answers
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slamgirl [31]

ok bet so basically I eont

7 0
3 years ago
Find the value of x.
Firdavs [7]

Step-by-step explanation:

DC is equal to 180°, so subtract 105 from 180.

180-105=75

180 is the total of the the angles when added together.

67°+75°=142

180-142=38

x=38

8 0
4 years ago
Is 12a-a simplified?
7nadin3 [17]
12a−a

=12a−1a

=12a+−1a

=a+a+a+a+a+a+a+a+a+a+a+a+−a

=a+a+a+a+a+a+a+a+a+a+a

=11a

5 0
4 years ago
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