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3 years ago

Add the following polynomials

Mathematics

1 answer:

Inga [223]3 years ago

3 0

-2.4x^2 -1.5x-11.4 is the answer

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I dont get it ? And need an explanation yk

nlexa [21]

Answer:

you had drawn wrong

Step-by-step explanation:

where

is your angle BJK

4 0

2 years ago

Help solve for x please

Inessa05 [86]

Answer: X=5.25
Explanation: the entire angle is a 90. 90-6=84. 84 divided by 16 is 5.25

3 0

2 years ago

Read 2 more answers

A scientist begins with 250 grams of a radioactive substance. After 250 minutes, the sample has decayed to 32 grams. Rounding to

s2008m [1.1K]

Answer:

Part 1 : $A=250 e^{-0.008223t}$

Part 2 : Half life is 84 minutes ( approx )

Step-by-step explanation:

Part 1 : Suppose the function that shows the amount( in grams ) of the substance after t minutes,

$A=A_0 e^{kt}$

If t = 0 min, A = 250 grams,

$250=A_0 e^{0}$

$\implies A_0 = 250$

If t = 250, A = 32 grams,

$32 = A_0 e^{250k}$

$32 = 250 e^{250k}$

$0.128 = e^{250k}$

Taking ln both sides,

$\ln(0.128) = 250k$

$\implies k =\frac{\ln(0.128)}{250}=-0.008223$

Hence, the equation that shows this situation,

$A=250 e^{-0.008223t}$

Part 2 : If A = 250/2 = 125,

$125 = 250 e^{-0.008223t}$

$0.5 = e^{-0.008223t}$

Taking ln both sides,

$\ln(0.5) = -0.008223t$

$\implies t =\frac{\ln(0.5)}{-0.008223}\approx 84$

Therefore, the half life of the substance would be 84 minutes.

8 0

3 years ago

Find the equation of the circle whose center and radius are given.

trapecia [35]

(x – h)² + (y – k)² = r²

Fill in the numbers

(x – 7)² + (y +3)² = 49

6 0

3 years ago

Read 2 more answers

Help, I’m really tired after a flight and I can’t do this please help me

maxonik [38]

Answer:

they r all the same shap but that is all I know

5 0

3 years ago