**Answer:**

453

**Step-by-step explanation:**

First you need to distrubute

4*7*4*4=448+5=453

**Answer:**

take 20 degree as reference angle

let hypotenuse be x

using cos rule

cos 20=adjacent/hypotenuse

0.93=7/x

0.93*x=7

x=7/0.93

x=7.5

**Step-by-step explanation:**

i believe N=14 N or its 10N

**Answer:**

D. 50 students

**Step-by-step explanation:**

First we find the area of the classroom which is worked out below and it is the shape of a rectangle;

Area of a rectangle = Length * Breadth

= 60 ft * 40 ft

= 2400 ft²

Now to find the number of students that she will allow in the classroom, we have to divide the area of the classroom which is 2400 ft²by the amount of space allocated to each student which will be;

=

= 50

This means she will allow 50 students into her class.

**Answer:**

24 eight-digit code.

**Step-by-step explanation:**

Frequency : 0 : 4

2 : 2

4 : 2

In total there are Eight (8) numbers and 3 frequent number ( which are 0, 2, 4 )

∴ 8 × 3 = 24.