M/6-7=2/3 pls help plssssd

sammy [17]

Answer:

4 kg of sugar would contain $1.2 \times 10^9$ crystals.

Step-by-step explanation:

Given that 3kg of sugar contains 9 × 10⁸ crystals, let "x" represent the number of sugar crystals 4kg of sugar would contain.

Thus, set up a proportion as follows:

3 kg : 9 × 10⁸ = 4 kg : x

$\frac{3}{9 \times 10^8} = \frac{4}{x}$

Solve for x. Cross multiply.

$3 \times x = 9 \times 10^8 \times 4$

$3x = 36 \times 10^8$

$3x = 3.6 \times 10^9$

Divide both sides by 3

$\frac{3x}{3} = \frac{3.6 \times 10^9}{3}$

$x = 1.2 \times 10^9$

4 kg of sugar would contain $1.2 \times 10^9$ crystals.

5 0

2 years ago

Algebra 2 please help

iVinArrow [24]

Answer: x+y=25000

int- 0.06x +0.085 =2000

multiply by 60

multiply interest by 100

60x+60y=60*25000

60x+85y=2000000

25y=500000

divided both by 25

y=20000 (8.5%)

x=5000 (6%)

Step-by-step explanation:

6 0

2 years ago

Kate can drive 50 miles in 45 minutes. How far can she drive in two hours?

ella [17]

Answer:

about 133.33 mile in two hours

Step-by-step explanation:

1 hour = 60 minutes

2 hour = 120 minutes

45 minutes = 3/4 hour

5 0

3 years ago

Given a:b and b:c, find a:b:c. Write the ratio in simplest form. a:b=4:7 and b:c=5:13 need help

saw5 [17]

Answer:

20:35:91

Step-by-step explanation:

Given:

$a:b=4:7\\ \\b:c=5:13$

Find:

$a:b:c$

1. Since $a:b=4:7,$ then

$a=4x\\ \\b=7x$

2. Since $b:c=5:13,$ then

$b=5y\\ \\c=13y$

3. We have $b=7x$ and $b=5y,$ so

$7x=5y\\ \\y=\dfrac{7}{5}x.$

4. Now,

$a=4x\\ \\b=7x\\ \\c=13\cdot \dfrac{7}{5}x=\dfrac{91}{5}x,$

so

$a:b:c=4x:7x:\dfrac{91}{5}x\\ \\a:b:c=20:35:91$

5 0

2 years ago

Andy is rewarded each time his current grade of C improves his goal of an A grade. What term describes successive close approxim

Dmitry [639]

Answer:

Shaping

Explanation:

Shaping is the method of successively reinforcing closer and closer approximations to a target ultimate behavior. Shaping includes reinforcing responses which are approximating to the one needed. The shaping method is important because an individual is not always able to naturally exhibit the exact target behavior but by reinforcing the behavior closer to the target behavior, the terminal behavior can be learnt and taught. Shaping is carried out by successive approximation. This is done when the the target response is so rare that it will take a lot of time waiting for the response to take place so that it can be reinforced. In the given question Andy is rewarded every time his current grade C closely approximated to the desired goal that is A grade. So through these subtle reinforcements Andy's behavior is shaped.

The steps in shaping are:

Reinforce any response which is close to the target terminal behavior in some way.
Reinforce the response more closely associated and resembled with desired behavior. The previous behavior should no longer be reinforced.
Continue reinforcing the responses that more closely approximates target behavior.
Continue to reinforce the subsequent approximations until the desired behavior is met.
Reinforce only the ultimate desired behavior once the desired behavior is reached.

Example:

Suppose a teacher wants her student give presentation in front of the whole class but the student is shy so he would not be capable of giving a presentation at once. So the student should be given rewards for his behaviors/responses that approximates closely to the desired goal. Such as giving him reward when he stands in front of class. Next, giving him reward when he introduces himself to the class at the start of presentation. Rewarding him when he tells the topic of the presentation. Ultimately he can give a presentation. Shaping can be achieved this way.

7 0

2 years ago