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2 years ago

Hey,um This is because this app keep's deleting my question'ssssssss

Mathematics

2 answers:

alukav5142 [94]2 years ago

8 0

Answer:

Well they delete questions like these lol

Step-by-step explanation:

So yeahhhhhhhhhhhhhhhhhhhhhhh

adelina 88 [10]2 years ago

6 0

Answer:

N/A

Step-by-step explanation:

#Nova

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Multiply the following equation

11111nata11111 [884]

Answer:

answer : B

Step-by-step explanation:

( x + 7) (3x -2) = 3x² - 2x +21x -14

( x + 7) (3x -2) = 3x²+19x -14

3 0

2 years ago

In the formula A(t) = A0ekt, A(t) is the amount of radioactive material remaining from an initial amount A0 at a given time t an

Alenkasestr [34]

Answer: 693 years

Step-by-step explanation:

Expression for rate law for first order kinetics is given by:

$A(t) =A_0e^{kt}$

k = rate constant

t = time taken for decomposition = 1

$A_0$ = Initial amount of the reactant

$A_t$ = amount of the reactant left = $A_0-\frac{0.1}{100}\times A_0=0.999A_0$

$0.999A_0=A_0e^{k\times 1}$

$0.999=e^k$

$k=-0.001year^{-1}$

for half life : $t=t_\frac{1}{2}$

$A_t=\frac{1}{2}A_o$

Putting in the values , we get

$\frac{1}{2}A_0=A_0e^{-0.001\times t_\frac{1}{2}$

$t_\frac{1}{2}=693 years$

Thus half life of this isotope, to the nearest year is 693.

8 0

3 years ago

Evaluate the expression if a =2.4, b = 0.237, and c =9.49

IRISSAK [1]

Answer:

(0.237)

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

What is a correct congruence statement for the triangles shown? Enter your answer in the box. △QDJ≅△ A triangle Q D J. The b

almond37 [142]

Answer: The correct congruence statement is $\triangle QDJ\cong \triangle MCW$ .

Explanation:

It is given that A triangle Q D J. The base D J is horizontal and side Q D is vertical. Another triangle M C W is made. The base C W and side M C are neither horizontal nor vertical. Triangle M C W is to the right of triangle Q D J.

The sides Q D and M C are labeled with a single tick mark. The sides D J and C W are labeled with a double tick mark. The sides Q J and M W are labeled with a triple tick mark.

Draw two triangles according to the given information.

From the figure it is noticed that

$QD\cong MC$