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Verdich [7]
3 years ago
6

Which list shows the order of original appearance on earth, from the earliest to the most recent organism? A. bacteria, lizards,

rhinoceros, trilobites   B. bacteria, rhinoceros, lizards, trilobites   C. trilobites, lizards, rhinoceros, bacteria   D. bacteria, trilobites, lizards, rhinoceros
Mathematics
1 answer:
tigry1 [53]3 years ago
5 0
<span>The order of original appearance on earth, from the earliest to the most recent organism is D. bacteria, trilobites, lizards, rhinoceros. Bacteria appeared in the Proterozoic era (2500-541 million years ago). Trilobites appeared in the Cambrian period (541-485 million years ago). Lizards appeared in the Jurassic period (201-145 million years ago). Rhinoceros appeared in the Neogene period (23-2.6 million years ago). Thus, the choice D is the right choice.</span>
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In Omak the sales tax is 8.4%. What is the total cost including tax Aakel spent on a $48 purchase?
Vikki [24]

Answer:

$52.03

Step-by-step explanation:

1. Approach

To solve this problem, first one needs to calculate the sales tax, then one must add that to the amount spent on the purchase. To calculate sales tax, one must convert the percent to decimal form, this can be done by dividing the percent by 100. Then one will multiply the decimal by the amount spent.

2. Find the tax

As states above; to calculate sales tax, one must convert the percent to decimal form, this can be done by dividing the percent by 100. Then one will multiply the decimal by the amount spent.

<u>a. convert percent to decimal</u>

8.4 / 100 = 0.084

<u>b. multiply the decimal by the amount spent</u>

48 * 0.084 = 4.032

The amount spent on sales tax is, $4.032

3. Find the total amount spent

Now all one has to do is add the amount spent in tax by the amount spent on the purchase.

48 + 4.032 = 52.032

Since money is only spent rounded to the second decimal point, one has to round the number;

52.03

6 0
2 years ago
The mean length of 5 childrens' index finger is 5.6cm.
rjkz [21]

The mean length (rounded to 2 DP) of these 8 people's index finger is 5.83

<h3>What is the mean length (rounded to 2 DP) of these 8 people's index finger?</h3>

The given parameters are:

<u>Children</u>

Mean = 5.6 cm

Frequency = 5

<u>Adult</u>

Mean = 6.2 cm

Frequency = 3

The mean length of these 8 people's index finger is calculated as:

\bar x = \frac{\sum fx}{\sum f}

So, we have

Mean = (5.6 * 5 + 6.2 * 3)/(5 + 3)

Evaluate

Mean = 5.83

Hence, the mean length (rounded to 2 DP) of these 8 people's index finger is 5.83

Read more about mean at

brainly.com/question/20118982

#SPJ1

3 0
1 year ago
A girl weighs 5/8 as much as her brother does. If the girl weighs 110 lb, how much does her brother weigh?
fomenos
Brother's weight * 5/8 = 110
Brother's weight * 5/8÷5/8 = 110÷ 5/8
Brother's weight = 176



7 0
3 years ago
Read 2 more answers
What is the variable and the operation in the algebraic expression math 6/x .
Stella [2.4K]

Answer:

x is the variable

Step-by-step explanation:

6 0
3 years ago
there were 64 basketball games during the NCAA tournament 16 of those games were decided by 3 points or less what percentage of
kirill115 [55]

Answer:

25%

Step-by-step explanation:

We can use a proportion to answer this question:

64 represent the 100% of the games

so:

x : 100 = 16 : 64

x = (16*100)/64 = 1600/64 = 25%

7 0
2 years ago
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