A 9-digit phone number cannot start with 0. Assume that there are no restrictions on the remaining 8 numbers. How many telephone numbers are possible in which all 9 digits are different? The possible number of 9-digit telephone numbers where all the digits are different is

Q391 FIND: The external reaction forces at A and B (that is find the forces exerted on the truss by the supports at A and B). SOLUTION STEPS: Step 1. Draw FBD of the truss. Step 2. Write equilibrium equations (net force = 0; net moment about any point = 0). You need as many equations as you have unknowns. Step 3. Solve for unknowns using Matlab GIVEN: The truss ABC is supported by a pin at A and a roller at B; external force P=100 N is applied at C as shown. The truss is in static equilibrium