Answer:
C) $20.80
Step-by-step explanation:
1 kg of cooking oil = $6.5
1 packet of cooking oil =2/5 kg
If 1 kg of cooking oil = $6.5
2/5kg of cooking oil = $X
Cross Multiply
1kg × $X = 2/5kg × $6.5
$X = 13/5
$X = 2.6
Hence 2/5kg of oil cost $2.6
Since 1 packet of oil = 2/5kg of oil , 1 packet of oil cost $2.6
The amount she spent if she bought if she bought 8 packets of the cooking oil is calculated as:
1 packet of oil = $2.6
8 packets of oil =
$2.5 × 8
= $20.80
Therefore,if Sara bought 8 packets of oil, the amount she would spend = $20.80
![\frac{1}{ \sqrt{7} -(- 2)} \\ rationalizing \: \: \: the \: \: \: denominator \: \: \: we \: \: \: have \\ = \frac{1}{ \sqrt{7} + 2 } \times \frac{ \sqrt{7} - 2}{ \sqrt{7} - 2} \\ = \frac{ \sqrt{7} - 2}{ {( \sqrt{7} )}^{2} - {(2)}^{2} } \\ = \frac{ \sqrt{7} - 2 }{7 - 4} \\ = \frac{ \sqrt{7} - 2}{3}](https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B%20%5Csqrt%7B7%7D%20%20-%28-%202%29%7D%20%20%5C%5C%20rationalizing%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20the%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20denominator%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20we%20%5C%3A%20%20%5C%3A%20%20%5C%3A%20have%20%5C%5C%20%20%3D%20%20%5Cfrac%7B1%7D%7B%20%5Csqrt%7B7%7D%20%2B%202%20%7D%20%20%5Ctimes%20%20%5Cfrac%7B%20%5Csqrt%7B7%7D%20%20-%202%7D%7B%20%5Csqrt%7B7%7D%20%20-%202%7D%20%20%5C%5C%20%20%3D%20%20%5Cfrac%7B%20%5Csqrt%7B7%7D%20%20-%202%7D%7B%20%7B%28%20%5Csqrt%7B7%7D%20%29%7D%5E%7B2%7D%20-%20%20%7B%282%29%7D%5E%7B2%7D%20%20%7D%20%20%5C%5C%20%20%3D%20%20%5Cfrac%7B%20%5Csqrt%7B7%7D%20-%202%20%7D%7B7%20-%204%7D%20%20%5C%5C%20%20%3D%20%20%5Cfrac%7B%20%5Csqrt%7B7%7D%20%20%20-%202%7D%7B3%7D%20)
Hope you could get an idea from here.
Doubt clarification - use comment section.
Answer:
Metronome
Step-by-step explanation:
Metronome gives a steady beat to people that cant count beats in a measure
In order to find all of these, you first must convert the percentage to a decimal. This would be 13% to 0.13.
Now, multiply 0.13 by all of these into a calculator.
1800 • 0.13 = 234
950 • 0.13 = 123.50
2200 • 0.13 = 286
3000 • 0.13 = 390
2600 • 0.13 = 338