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mafiozo [28]
2 years ago
6

Element X is a radioactive isotope such that every 14 years, its mass decreases by half.

Mathematics
1 answer:
DanielleElmas [232]2 years ago
4 0
Element X is a radioactive isotope such that every 14 years, its mass decreases by half.
Given that the initial mass of a sample of Element X is 80 grams, how much of the
element
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Fill in the blank.
Marrrta [24]

Question:

Fill in the blank.

23 x 6 = (20 + 3) * 6

23 x 6 = _ + (3x6)

Options

20 * 6

20 * 3

20 * 5

Answer:

20 * 6

Step-by-step explanation:

Given

Expression 1:  23 * 6 = (20 + 3) * 6

Expression 2:  23 * 6 = __ + (3 * 6)

Required

Fill in the blank

From Expression 1

23 * 6 = (20 + 3)*6

Using Distributive Property; The expression becomes

23 * 6 = 20 * 6 + 3 * 6

23 * 6 = (20 * 6) + (3 * 6)

By Comparing this with expression 2

23 * 6 = __ + (3 * 6)

The blank position is occupied by 20 * 6.

Hence, the correct option that fills the missing blank correctly is 20 * 6

7 0
2 years ago
on a map, each centimeter represents 45 kilometers. two towns are 135 kilometers apart. what is the distance between the towns o
Anastasy [175]
1 cm = 45 km
x cm = 135 km

135/45 = 3 cm

distance between the towns on the map is 3 cm.

i hope this helps :)
8 0
3 years ago
Caroline is working two summer jobs, Making $19 per hour lifeguarding and making $10 per hour washing cars. In a given week she
kicyunya [14]

Answer:

12 hours

Step-by-step explanation:

3 hours landscaping = $36

She still needs to make $224 to meet her requirement.

$224 divided by $19 tutoring = 11.79 hours

224÷19=11.79

Rounded to the nearest whole number: 12

This would mean Makayla worked a total of 15 hours and made $264. Which meets her requirements.

4 0
3 years ago
Find the area and please show the steps and explain. Thanks!
Anit [1.1K]
I'm pretty sure you just add all the numbers up so it would be 569.9 ft 
3 0
2 years ago
When r = 4, S = 9, and t = 2. *<br> 5r2 + 4s<br> (4 + 6t) - 12<br> pls help!!
Lina20 [59]

Step-by-step explanation:

5×16+4×9=116

(4+6×2)-12=4

3 0
2 years ago
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