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2 years ago

Element X decays radioactively with a half life of 15 minutes. If there are 600 grams

Mathematics

1 answer:

alexdok [17]2 years ago

6 0

Answer: t = 16.49304 ≈ 16.5 minutes

Step-by-step explanation: I pressed see solution

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If each quadrilateral below is a parallelogram,find the missing measures.

zhenek [66]

Answer:

Part 1) $MN=31\ units$

Part 2) $KN=45\ units$

Part 3) m∠K=61°

Part 4) m∠L=119°

Part 5) m∠M=61°

Step-by-step explanation:

we know that

In a parallelogram opposite angles and opposite sides are congruent and consecutive angles are supplementary

Part 1) Find the side MN

we know that

MN≅KL ----> by opposite sides

we have

$KL=31\ units$

therefore

$MN=31\ units$

Part 2) Find the side KN

we know that

KN≅LM ----> by opposite sides

we have

$LM=45\ units$

therefore

$KN=45\ units$

Part 3) Find the measure of angle K

we know that

m∠K+m∠N=180° ----> by consecutive interior angles

we have

m∠N=119°

substitute

m∠K+119°=180°

m∠K=180°-119°

m∠K=61°

Part 4) Find the measure of angle L

we know that

m∠L≅m∠N ----> by opposite angles

we have

m∠N=119°

therefore

m∠L=119°

Part 5) Find the measure of angle M

we know that

m∠M≅m∠K ----> by opposite angles

we have

m∠K=61°

therefore

m∠M=61°

7 0

3 years ago

All polyhedrons are prisms or pyramids. True or false

JulsSmile [24]

Answer:

Step-by-step explanation:

False (APEX)

3 0

3 years ago

Read 2 more answers

HELPPPPP MEEE PLEASE

Brut [27]

The answer is C I think

4 0

3 years ago

sandy has $200 in her bank account. if she writes 6 checks for exactly $19.98, what expression describes the change in her bank

kkurt [141]

6x+19.98=200
200-19.98=6x
X= 200-19.98/6
= solve for it.

7 0

3 years ago

Read 2 more answers

Suppose Y varies directly with X and Y equals 10 when X equals -3 what direct variation equation relates XNY what is the value o

xeze [42]

Answer:

Expression: Y = -10/3 X

Y = 10/3

Step-by-step explanation:

If Y varies directly as X, then;

Y∝X

Y = kX

k is the constant of variation

If Y = 10 and X = -3

10 = -3k

k = -10/3

Substitute k = -10/3 into the expression Y = kX

Y = -10/3 X

This gives the required expression

To get the value of Y when X = -1

Recall that Y = kX

Y = -10/3 (-1)

Y = 10/3

Hence the value of Y is 10/3

8 0

3 years ago