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Marrrta [24]
3 years ago
15

PLEASE HELP ASAP I FORGOT HOW TO DO THIS!

Mathematics
1 answer:
nadya68 [22]3 years ago
5 0

Answer:

its A

Step-by-step explanation:

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A) work out (8 x 10^-3) x (2 x 10^-4). Give your answer in standard form.
mafiozo [28]

Step-by-step explanation:

A) \\ (8 \times  {10}^{ - 3} ) \times (2 \times  {10}^{ - 4} ) \\    = 8 \times 2 \times  {10}^{ - 3}  \times {10}^{ - 4}  \\  = 16 \times  {10}^{ - 3 - 4} \\  = 16 \times  {10}^{ - 7} \\  = 1.6 \times  {10}^{ - 6}  \\  \\ B) \\ (6 \times  {10}^{ 2} )  \div  (3\times  {10}^{ - 5} ) \\  \\     =  \frac{6 \times  {10}^{ 2}}{3\times  {10}^{ - 5}}  \\  \\  =  \frac{2\times  {10}^{ 2}}{ {10}^{ - 5}}   \\  \\  = 2 \times {10}^{ 2 + 5} \\  \\  = 2 \times {10}^{7} \\

4 0
3 years ago
This shape is broken up into rectangles. What is the area of the<br> entire shape?
Basile [38]

Answer:

38inch2

Step-by-step explanation:

3inch*2inch+8inch*4inch

=6inch2+32inch2

=38inch2

3 0
2 years ago
the sum of 35 and one-fifth part of itself is added to the sum of one-seventh part of itselfcand three​
Alex777 [14]

Answer:

50

Step-by-step explanation:

35/5 = 7

35/7 = 5

35 + 7 + 5 + 3 = 50

5 0
4 years ago
I need help with this
Finger [1]

ask your teacher.

use a calculator.

Use math tutoring for this module.

Pay more attention to the lecture.

3 0
3 years ago
Find the standard form of the equation of the parabola with a focus at (-8, 0) and a directrix at x = 8
il63 [147K]
The best thing to do when finding conic equations from the focus and directrix is to sketch a little graph. When you do this, you can easily identify the vertex right in the middle and can determine if the parabola is vertical or horizontal since it must wrap around the focus. This way you know whether the x or the y is squared. When you sketch the focus and directrix, you will see the vertex is at (0,0) and the parabola is sideways, so the y is squared. now remember your formula is y^2=4px where p is the distance from the vertex to the focus, or you could write x=1/(4p)y^2. Now from 0 to -8 is -8 so that means 4p=-32. This gives you y^2=-32x or x=-1/32y^2. Thsi type of question will also be on your module exam and then the final exam so be sure to practice some:)
8 0
3 years ago
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