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son4ous [18]
3 years ago
10

What is the value of (3 + 2)2 - 5 * 3 +23?

Mathematics
1 answer:
tamaranim1 [39]3 years ago
6 0

Answer:

15

Step-by-step explanation:

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PLEASE HELP! I'LL GIVE BRAINLIEST!!!!!!!
daser333 [38]

Answer:

1.6x10^-18 gram

Step-by-step explanation:

(5.3 x 10⁻²³ gram/molecule) x (20,000 molecule)

= (5.3 x 10⁻²³ x 2 x 10⁴) gram

= (10.6 x 10⁻²³⁺⁴) gram

= (1.06 x 10⁻²³⁺⁵) gram

= 1.06 x 10⁻¹⁸ gram

We need to find the mass of 20,000 molecules of oxygen. It can be calculated using unitary method. Here, we can multiply 20,000 molecules  by the mass of one oxygen molecule.

7 0
3 years ago
The area of an rectangle is 750 square centimeters. If the base is 50 centimeters, what is the height? Remember - the formula to
elena-14-01-66 [18.8K]

Answer:

The answer is C. or 15 cm

Step-by-step explanation:

50 cm x 15 cm= 750 cm

Multiply 50 centimeters by 15 centimeters to get 750 centimeters

6 0
3 years ago
A scientist is studying a form of bacteria that doubles every hour. if the petri dish starts with 2 grams of bacteria
strojnjashka [21]

Answer:

b = 2x²

Step-by-step explanation:

Let the number of bacteria = x

Every hour, the number of bacteria doubles itself, = x * x = x²

But the bacteria started with 2g,

The number of bacteria present is equal to

2 * x² = 2x².

At every hour, the growth of the bacteria is at 2x²

3 0
3 years ago
Read 2 more answers
Let f(x) = -5e^(-x/3)<br><br> Find f^(6) (1)
Luba_88 [7]

Let's take the first derivative:

f'(x) = (-5e^{-x/3})' = -5 \times (e^{-x/3})' = -5e^{-x/3} \times \left(-\dfrac{1}{3}\right) = \dfrac{5}{3}e^{-x/3}.

Notice that we can write this as:

f'(x) = -\dfrac{f(x)}{3}.

By taking the derivative of both sides n times, we get:

f^{(n+1)}(x) = -\dfrac{f^{(n)}}{3}.

This means that each time you take a derivative, a factor of -\dfrac{1}{3} will appear. So we conclude that:

f^{(n)}(x) = \left(-\dfrac{1}{3}\right)^nf(x).

Taking n=6 and x=1, we get:

f^{(6)}(1) = \left(-\dfrac{1}{3}\right)^6 f(1) = \dfrac{-5e^{-1/3}}{729} = -\dfrac{5}{729}e^{-1/3}.

So we finally get:

\boxed{-\dfrac{5}{729}e^{-1/3}}.

6 0
3 years ago
Solve the equation 1/4 x + 2 = 6
loris [4]

Answer:

x = 16

Step-by-step explanation:

Step 1: Subtract 2 from both sides.

  • \frac{1}{4}x + 2 = 6
  • \frac{1}{4}x+2-2=6-2
  • \frac{1}{4}x=4

Step 2: Multiply each side by 4 in order to isolate x.

  • \frac{1}{4}x * 4 = 4 * 4
  • x = 16

Therefore, x = 6.

Hope you have a lovely rest of your day/night.

4 0
2 years ago
Read 2 more answers
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