What is the length of sr ?

9 units
12 units
15 units
18 units

 THe correct option is (C) 15.

Step-by-step explanation:  We are given to find the length of SR in the right-angled triangle SRQ as shown in the figure.

Since RT is perpendicular to the hypotenuse SQ, so triangle RTQ and SRT are also right-angled triangles at angle RTQ and RTS respectively.

Also, RQ = 20 units and TQ = 16 units.

Using Pythagoras theorem in triangle RTQ, we have

Now, since RT is perpendicular to the hypotenuse of ΔRST, so we get

Again, using Pythagoras theorem in right-angled triangle RST, we get

Thus, the length of SR is 15 units.

Option (C) is CORRECT.

the inequality is:

250c+180g≥950

step-by-step explanation:

let c denotes the number of days in a week   miyoko worked as a cryptographer.

and g denotes the number of days in a week she works as a geologist.

now we are given that she earns $250 for every day she works as a cryptographer,and earns $180 for every day she works as a geologist.

now miyoko's goal is to earn more than $950 this week.

hence, the inequality could be represented as:

250c+180g≥950

step-by-step explanation:

is their an equation anywhere i can take a   look at it and see if i am right.