2 years ago

Element X is a radioactive isotope such that every 12 years, its mass decreases by half.

Mathematics

1 answer:

morpeh [17]2 years ago

6 0

Answer:636

Step-by-step explanation: I just kno

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What is the volume of a hemisphere with a radius of 4.3 cm, rounded to the nearest tenth of a cubic centimeter?

ladessa [460]

Step-by-step explanation:

$\frac{4}{3} \pi {(4.3)}^{3} \\ \frac{4}{3} \pi(79.507) \\ \frac{318.028}{3} \pi \\ 106.0093\pi \\ \frac{1}{2} 333.038 \\ 166.5 {cm}^{3}$

5 0

2 years ago

Which expression is equivalent to b^-2/ab^-5?<br>a) a/b^5<br>b)1/ab^5<br>c)a^3b/1<br>d)b/a

Snezhnost [94]

$\bf a^{-{ n}} \implies \cfrac{1}{a^{ n}}\qquad \qquad
\cfrac{1}{a^{-n}}\implies a^{{ n}}\\\\
-------------------------------\\\\
\cfrac{b^{-2}}{ab^{-5}}\implies \cfrac{b^{-2}\cdot b^{+5}}{a}\implies \cfrac{b^{-2+5}}{a}\implies \cfrac{b^3}{a}$

4 0

2 years ago

Write one word problem using arithmetic sequences and another using geometric sequences.

Levart [38]

Hey There!

If i got this down right,
An = A1 + (n - 1)d
Sn = A1 + A2 + A3 + ... + An
A1 is given by
Sn = n (A1 + An) / 2
For Example

An = A1 + (n - 1)d
= 6 + 3 (n - 1)
= 3 n + 3
n = 50

Hope This Helps!!!

5 0

2 years ago

Read 2 more answers

The diameter of a circle is 1.4 centimeters. Find its area. Use 3.14 Round to the nearest

NeTakaya

Answer:

Area = 1.54

Step-by-step explanation:

Area = π $r^{2}$