Ask question

Ask question

All categories

3 years ago

9

The half-life of a radioactive kind of tellurium is 25 minutes. If you start with 88 grams of it, how much will be left after 50

minutes?

1 answer:

LUCKY_DIMON [66]3 years ago

5 0

Notice that 50 minutes is twice the half-life.

After 25 minutes, half of the starting amount remains, so that 88g decays to 44g.

After another 25 minutes (a total of 50 minutes), the 44g will decay to 22g.

You might be interested in

A container is filled with 100 grams of bird feed that is 80% seed. Tom and Sally want to mix the 100 grams with bird feed that

zzz [600]

Answer:

Step-by-step explanation:

I need help to

5 0

3 years ago

What is the maximum of f(x)= sin(x)?<br><br> -2π<br> -1<br> 1<br> 2π

nadezda [96]

Answer:

1

Step-by-step explanation:

the maximum of f(X)=sin(X) is 1

6 0

3 years ago

While on vacation in Mexico, Karla’s family exchanged 250 dollars for 5,000 pesos. Karla bought a statue of a surfing monkey for

Serjik [45]

Answer:

$23.26

Step-by-step explanation:

8 0

3 years ago

On a coordinate plane, the segment with endpoints (10, 40) and (70, 120) is

OlgaM077 [116]

Answer:

The length of the resulting segment is 500.

Step-by-step explanation:

Vectorially speaking, the dilation is defined by following operation:

$P'(x,y) = O(x,y) + k\cdot [P(x,y)-O(x,y)]$ (1)

Where:

$O(x,y)$ - Center of dilation.

$P(x,y)$ - Original point.

$k$ - Scale factor.

$P'(x,y)$ - Dilated point.

First, we proceed to determine the coordinates of the dilated segment:

( $P(x,y) = (10, 40)$ , $Q(x,y) = (70, 120)$ , $O(x,y) = (0,0)$ , $k = 5$ )

$P'(x,y) = O(x,y) + k\cdot [P(x,y)-O(x,y)]$

$P(x,y) = (0,0) +5\cdot [(10,40)-(0,0)]$

$P'(x,y) = (50,200)$

$Q'(x,y) = O(x,y) + k\cdot [Q(x,y)-O(x,y)]$

$Q' (x,y) = (0,0) +5\cdot [(70,120)-(0,0)]$

$Q'(x,y) = (350, 600)$

Then, the length of the resulting segment is determined by following Pythagorean identity:

$l_{P'Q'} = \sqrt{(350-50)^{2}+(600-200)^{2}}$

$l_{P'Q'} = 500$

The length of the resulting segment is 500.

3 0

3 years ago

QUESTION #1 - Probability

Olin [163]

Answer:

<em>C. 1/60</em>

Step-by-step explanation:

Probability of 3 on a cube: 1 / 6

Probability of 9 from cards 1-10: 1/10

1/6 x 1/10 = 1/60

7 0

3 years ago