John's sister went shopping with him. she expected to spend $100 on clothes, but spent only $10. john wanted to her calculate the percent error, but he thinks he may have made a mistake. are his calculations below correct? why or why not? ratio = |$100 − $10| $90 = 10 90 ≈ 11%

Yes, he applied formula incorrectly.

Step-by-step explanation:

The formula for percent error is given by :-

Given : Expected value =  $100

Actual value = $10

Then,

So, Yes, the calculation did by him was incorrect .

phosphate, calcium ion, chloride ion, neon atom

step-by-step explanation:

solution:

we have to construct

∠m nt ≅ ∠p qr

the steps to draw this construction are

step 1: use a compass to draw an arc from point q which intersects the side pq at point a and the side qr at point b.

step 2: draw a segment nt and use the same width of the compass to draw an arc from point n which intersects the segment nt at a point x.

step 3:

step 4: join points n and y using a straightedge.

step 3:

option (d).maintaining the same width of the compass as ab, draw an arc from point x such that it intersects the arc drawn from n in a point y.

to draw   congruent angles , 1. width of compasses while drawing two angles should be same i.e from point at which angle has to be drawn, 2.the distance between the two points where the compass intersects the two sides should be same while drawing any two congruent angles.