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Sidana [21]
3 years ago
8

A sample of iron-59 contains 50mg. One hundred days later, the sample contains 10.75 mg. What is the half-life of iron-59, in da

ys?

Mathematics
1 answer:
DiKsa [7]3 years ago
7 0

Answer:

45 days

Step-by-step explanation:

Please kindly check the attached files for details.

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in isosceles triangle the length of a leg is 17 cm, the vase is 16 cm. find the length of the altitude to the base
bogdanovich [222]

Answer:

15 cm

Step-by-step explanation:

The altitude is one leg of the right triangle formed by the altitude, half the base, and the triangle side. The Pythagorean theorem applies, so you have ...

... (17 cm)² = (altitude)² + (16 cm/2)²

... altitude = √(17² -8²) cm = √225 cm

... altitude = 15 cm

8 0
2 years ago
The total cost of a sweater and a jacket was $71.55. If the price of the sweater was $3.19
Andrej [43]

Answer:

The cost of the sweater is $37.37

Step-by-step explanation:

71.55-3.19=68.36

68.36 ÷ 2=34.18

34.18+3.19=37.37

6 0
3 years ago
What does the following<br> expression mean?<br> 7!<br><br> This is permutations.
nevsk [136]
It’s 7x6x5x4x3x2x1
permutation is multiplying
5 0
2 years ago
Find the slope of the line that passes through the points (0,-4) and (10,3)
expeople1 [14]

Answer:

\displaystyle m = \frac{7}{10}

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

<u>Algebra I</u>

  • Coordinates (x, y)
  • Slope Formula: \displaystyle m = \frac{y_2-y_1}{x_2-x_1}

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify</em>

Point (0, -4)

Point (10, 3)

<u>Step 2: Find slope </u><em><u>m</u></em>

Simply plug in the 2 coordinates into the slope formula to find slope <em>m</em>

  1. Substitute in points [Slope Formula]:                                                              \displaystyle m = \frac{3--4}{10-0}
  2. [Fraction] Subtract:                                                                                           \displaystyle m = \frac{7}{10}
8 0
3 years ago
3x/5 - x = x/5 - 5/2?
laila [671]
X= 4.167 you cross multiply both the equations. so you get 30x - 50x = 10x - 125. you shift all the values of x on side and then divide it by 125 sso you get x= 4.167 
6 0
3 years ago
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