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3 years ago

-10.7474..... as a fraction

Mathematics

1 answer:

kondaur [170]3 years ago

6 0

In fraction, it would be:

-107474/10000

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What is 17.210.000.000 written in scientific notation?

lina2011 [118]

Answer:

i got 1.721 x 10^10 :)

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3 years ago

A forensic detective is called to the scene of a murder at 2 am. When she checks the temperature of the body, she sees that it i

Readme [11.4K]

Newton's Law of cooling is
$T(t)=T_{a}+(T_{0}-T_{a})e^{-0.1947t}$
where
T(t) = temperature of the body after t hours, 80 °F
$T_{a}$ = ambient temperature, 65 °F
$T_{0}$ = normal body temperature, assumed to be 98.6 °F

The elapsed time since death is obtained from
$65+(98.6-65)e^{-0.1947t|} = 80$
$33.6e^{-0.1957t}=15$
$-0.1947t=ln \frac{15}{33.6}$
$t= \frac{ln(15/33.6)}{-0.1947} =4.142$

4.142 hours before 2 am is 9:52 pm (the previous day) approximately.

Answer: 9:52 pm the previous day.

5 0

3 years ago

Help ASAP it’s my last questions pleaseeee

alekssr [168]

Answer:

None

Step-by-step explanation:

Where is the question?

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3 years ago

Four friends go out to eat and their meal costs $86.50. The sales tax is 6.75% and they tip the waiter 20%. How much should each

Stolb23 [73]

Answer:

$27.41

Step-by-step explanation:

Meal Cost = $86.50

Sales Tax= 6.75% of the Meal Cost

= 6.75% X 86.50

= 0.0675 X 86.50

=$5.84

They tipped the Waiter 20%

20% of 86.50

=0.2 X 86.50

=$17.30

Total Bill= Meal Cost + Sales Tax + Tip

= 86.50 +5.84 + 17.30

=$109.64

Since the friends are four, each one will be expected to pay:

$109.64/4

=$27.41

Each of the friends should pay $27.41 to the nearest cent.

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3 years ago

Anderson uses the discriminant to correctly find the number of real solutions of the quadratic equation x2 + 4x + 8 = 0. Which e

andreyandreev [35.5K]

Answer:

Option 3rd is correct

The equation has no real number solutions because the discriminant is less than 0

Step-by-step explanation:

Discriminant(D)of a quadratic equation $ax^2+bx+c = 0$ is given by:

$D = b^2-4ac$

If D = 0 , real zero of multiplicity 2.
If D < 0, two zeros that are complex

if D > 0, then two real zeros that are distinct.

As per the statement:

Anderson uses the discriminant to correctly find the number of real solutions of the quadratic equation:

$x^2+4x+8=0$

On comparing the given equation with $ax^2+bx+c = 0$ we have;

a = 1, b = 4 and c = 8

then;

$D = (4)^2-4(1)(8) = 16-32 = -16$

⇒ $D = -16 < 0$

By definition;

Discriminant is less than 0

equation does not have real roots

Therefore, the equation has no real number solutions because the discriminant is less than 0

6 0

4 years ago