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love history [14]
3 years ago
5

About how many times larger than the diameter of a red blood cell is the diameter of a grain of sand? Write your answer using a

power of ten. The red blood cell is 8.4 times 10 to the power of negative 6. The grain of sand is 2.4 times 10 to the power of negative 3. I'm not quite sure how to work this problem out from here.
Mathematics
1 answer:
Alchen [17]3 years ago
6 0

Answer:

0.29\cdot10^3

Step-by-step explanation:

Red blood cell: 8.4\cdot 10^{-6}

Grain of sand: 2.4\cdot 10^{-3}

The "how many times larger" part can be figured out by forming a ratio between the two diameters above:

\frac{2.4\cdot 10^{-3}}{8.4\cdot 10^{-6}} = \frac{2.4}{8.4}\cdot\frac{10^{-3}}{10^{-6}}\approx 0.29\cdot 10^{-3-(-6)}=0.29\cdot10^3

Note that dividing the powers of ten corresponds to subtracting the denominator power from the numerator power of 10.

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the home teams score exceeded 2 times the visiting teams score by 5 if the visiting teams score is x which expression represents
yaroslaw [1]

Answer:

X x 2= 5

Step-by-step explanation:

6 0
4 years ago
Pls help with qn 13!!!!
balandron [24]
4243.6-4000=243.6/4000= 0.06

Interest rate 0.06%
4 0
3 years ago
A church rings its bells every 15 minutes, the school rings its bells every 20 minutes and the day care center rings its bells e
ankoles [38]

Answer:

As few as just over 345 minutes (23×15) or as many as just under 375 minutes (25×15).

Imagine a simpler problem: the bell has rung just two times since Ms. Johnson went into her office. How long has Ms. Johnson been in her office? It could be almost as short as just 15 minutes (1×15), if Ms. Johnson went into her office just before the bell rang the first time, and the bell has just rung again for the second time.

Or it could be almost as long as 45 minutes (3×15), if Ms. Johnson went into her office just after the bells rang, and then 15 minutes later the bells rang for the first time, and then 15 minutes after that the bells rang for the second time, and now it’s been 15 minutes after that.

So if the bells have run two times since Ms. Johnson went into her office, she could have been there between 15 minutes and 45 minutes. The same logic applies to the case where the bells have rung 24 times—it could have been any duration between 345 and 375 minutes since the moment we started paying attention to the bells!

Step-by-step explanation:

7 0
3 years ago
Paige bought a case of sunflower seeds for her baseball team. The case holds nine boxes of seeds. There are 36 bags of seeds ins
8090 [49]

Answer:

.50 cents

Step-by-step explanation:

If there is 36 bags that come to a total cost of 65.62 than to find out you would simply divide.

36/65.62

.54

Round to nearest cent

.50

3 0
4 years ago
30
Anna [14]

Answer:

15% if I remember correctly

6 0
3 years ago
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