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Ipatiy [6.2K]
2 years ago
13

Element X decays radioactively with a half life of 15 minutes. If there are 340 grams of Element X, how long, to the nearest ten

th of a minute, would it take the element to decay to 6 grams?
Mathematics
1 answer:
NikAS [45]2 years ago
6 0

Answer: 57 min

i used a calculator.

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Find the volume of a square pyramid with base edges of 48 cm and a slant height of 26 cm.
solmaris [256]
The volume of a square pyramid can be derived from the expression that the volume of an object is equal to the product of the area of the base times its height. For a square pyramid, it can be simplified as V = a^2(h)/3 where a is the side of the square base and h is the height. However, we are given the slant height. The equation would be:

V = a^2(h)/3

s^2 = (a/2)^2 + h^2     where s is the slant height
h = √( s^2 - (a/2)^2)
h = √( 26^2 - (48/2)^2)= 10

V = 48^2(10)/3 = 7680 cm^3 --> OPTION C

3 0
3 years ago
Help will give thanks to the first to answer
satela [25.4K]

Answer:

56

Step-by-step explanation:

10 \times 5 + 6

50 + 6 = 56

7 0
2 years ago
Read 2 more answers
Nita gana $ 20 por semana paseando al perro de su vecino. También gana $ 2 por cada rosa que vende de su jardín de rosas. Nita q
Rudik [331]

Answer:

La situación está representada por el siguiente sistema:

y = 20+2\cdot x

y \ge 50

Donde:

x - Cantidad de rosas vendidas semanalmente.

y - Ganancia semanal, medida en dólares.

Step-by-step explanation:

De acuerdo con el enunciado, Nita gana una cantidad fija cada semana por pasear al perro de su vecino, con un monto de $ 20, mientras que gana en función de la cantidad de rosas a vender, con un valor unitario de $ 2. Si ella desea ganar al menos $ 50, por tanto, se requiere construir el siguiente sistema, conformado por una ecuación y una inecuación:

y = 20+2\cdot x (1)

y \ge 50 (2)

Donde:

x - Cantidad de rosas vendidas semanalmente.

y - Ganancia semanal, medida en dólares.

4 0
3 years ago
Estimate the sum 11 3/8 + 9 7/10 + 21 1/4 by rounding each mixed number to the nearest whole number. Then find the exact sum
vodka [1.7K]
Answer:
Approximately 42.
Exact sum is 42 13/40.

Explanation:
Estimate 11 3/8: 11
Estimate 9 7/10: 10
Estimate 21 1/4: 21
Add them together: 42.

11.375 + 9.7 + 21.25 = 42.325
I made them into decimals and then will convert it into fraction.
42.325 = 42 13/40

Hope this helps!
3 0
3 years ago
F(-3)<br><br> f(x)= 3 to the power of x
____ [38]
1/27
See attached picture
4 0
2 years ago
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