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laiz [17]
3 years ago
7

Find the area of a triangle with a 21 cm base and 4 cm height

Mathematics
2 answers:
Marta_Voda [28]3 years ago
7 0

Answer:

42 cm^2

Step-by-step explanation:

Base = 21 cm

Height = 4 cm

Area = \frac{base\times height}{2}

Substitute values into the given equation

A = \frac{21\times 4}{2} \\\\A = \frac{84}{2} \\\\A = 42cm^2

babunello [35]3 years ago
6 0

Answer:

42

Step-by-step explanation:

Area of a triangle is base times height divided by two

21 times 4 equals 84

84 divided by 2 = 42

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The half-life of a radioactive isotope is 10 years. About how long would it take 5 grams of the isotope to decay until there wer
valkas [14]

Answer:

Option A. 10 years

Step-by-step explanation:

we know that

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8 0
3 years ago
Jesse drank 3/4 of liter of water Monday before going jogging. He drank 3/5 of a liter of water after his jog. How much water di
charle [14.2K]

Answer:

1\frac{7}{20}

Step-by-step explanation:

Step one

Given data

On  Monday, Jesse drank 3/4 of liter of water before jogging

and drank 3/5 of liter after jogging

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