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3 years ago

A virus strain is 0.00000015 meters in length. What is the length in scientific notation?

Mathematics

2 answers:

yulyashka [42]3 years ago

7 0

Answer:

1.5*10^-5

Step-by-step explanation:

Elena-2011 [213]3 years ago

6 0

Hey there! I'm happy to help!

Scientific notation is writing a number 1-10 multiplied by ten to a certain power. We see that we can write the number 1.5 to fit this.

We want to multiply by ten to a negative power as the decimal has been moved to the left. Let's count how many times we need to move the decimal over to get to 1.5.

If we count this, we have to move 7 places to get the decimal in the right spot. Therefore, to write this in scientific notation, we would write 1.5×10^-7.

Have a wonderful day! :D

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3 years ago

Read 2 more answers

The diagram shows a circle, centre O.<br> Work out the value of a. <br> BCO=41 degrees

sattari [20]

Answer:

a = 49°

Step-by-step explanation:

OB = OC ( both radii of the circle ), thus

Δ BOC is isosceles and the base angles are congruent, that is

∠ OBC = ∠ OCB = 41° , so

∠ BOC = 180° - (2 × 41)° = 180° - 82° = 98°

The angle on the circumference BAC is half the angle at the centre for angles subtended on the same arc , thus

a = 0.5 × 98° = 49°

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