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2 years ago

1. Compare 2.01 x 1015 and 2.8 x 1013. Which number is larger?

Mathematics

1 answer:

Leya [2.2K]2 years ago

6 0

Answer:

If these are in exponent form -- the answer would be 2.01 x $10^{15}$ > 2.8 x 10.3

Step-by-step explanation:

Look at the sheet attached.

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Find the value of n 1) 15/40 =n/3

stepladder [879]

Answer:

n = 1.125

Step-by-step explanation:

$\frac{15}{40} = \frac{n}{3}$

(Use Cross Product)

40n = 15 × 3

40n = 45

n = 1.125

7 0

2 years ago

Last year the depth of the river was 4.2 feet deep. This year it dropped 25%. Find the depth of the river this year to cross it.

Novosadov [1.4K]

Answer:

The river is 3.15 feet deep.

Step-by-step explanation:

First let's recognize what we need to find: the depth of the river

We know last year the river was 4.2 feet deep, but it dropped 25%. This means we also need to find how much it dropped. To find this, we need to know what 25% of 4.2 is. Write an equation for this.

y = 25% of 4.2

y = 0.25 • 4.2

y = 1.05

This means that the river dropped 1.05 feet. To know its depth now, we need to subtract 1.05 from 4.2. Write an equation for this.

d = 4.2 - 1.05

d = 3.15

The river is 3.15 feet deep.

Hope this helps!

4 0

3 years ago

Tan y+cot y= sec y x csc y prove the identity (y is the variable)

adell [148]

Answer:

Step-by-step explanation:

tany+coty =

$\frac{siny}{cosy} + \frac{cosy}{siny}$ ·

$\frac{sin^{2}y + cos^{2}y }{cosysiny}$

$\frac{1}{cosysiny}$

$(secy) (cscy)$

3 0

2 years ago

The figure below shows a straight line AB intersected by another straight line t:

BaLLatris [955]

When two straight lines intersect, the pairs of nonadjacent angles in opposite posi-tions are known as vertical angles.

If a segment AB is intersected by a transversal labeled t, then ∠1 and ∠3 and ∠2 and ∠4 are vertically angles formed by the transversal t on the segment AB.

Angles ∠1 and ∠2 can be described as adjacent and supplementary angles, so

$m\angle 1+m\angle 2=180^{\circ}$ .

Angles ∠3 and ∠2 can be also described as adjacent and supplementary angles, so

$m\angle 3+m\angle 2=180^{\circ}$ .

Subtract from the first equation the second equation:

$m\angle 1+m\angle 2-(m\angle 3+m\angle 2)=180^{\circ}-180^{\circ},\\ m\angle 1-m\angle 3=0,\\ m\angle 1=m\angle 3$ .

Similarly you can prove that $m\angle 2=m\angle 4$ .

4 0

3 years ago

Any number is divisible by 2 is also divisible by 6 find a counter example to show that conjecture is false

likoan [24]

Answer:

Step-by-step explanation:

To be divisible by 6, an even number must also be divisible by 3. Two of every three even numbers are not divisible by 3, so are not divisible by 6.

5 0

2 years ago